City Council/Public Financing Authority
September 2, 2025

The Airshow is anticipated to require the following review and approval by the City of Huntington Beach as the Lead Agency under CEQA and the California State Lands Commission as a Responsible Agency under CEQA:
• Certification of the Final Environmental Impact Report. • Issuance of a Coastal Development Permit (CDP) from the California Coastal Commission (CCC).
• Approval of a State Lands Lease(s) and/or Lease Amendment from the California State Lands Commission.
• Approval of the Specific Event Permit Application.

Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-6 ESA/202300046.01 Final Environmental Impact Report August 2025

Chapter 3, Environmental Setting, Impacts, and Mitigation Measures
Section 3.2, Biological Resources

3.2.5.1 Special-Status Species

Above ground, flights associated with the Airshow could result in bird strikes. According to a 2006 study, the majority of bird strikes (74 percent) occur within 500 feet above ground level (Dolbeer 2006). In addition, the FAA reported that 70 percent of bird strikes from 1990 to 2022 occurred at 500 feet above ground level (FAA 2023). The majority of the flights planned for the Airshow are expected to fly 500 to 1,000 feet above mean sea level (MSL) and would only occur during the Airshow hours (historically between 10:00 AM and 5:00 PM) and at nighttime, when bird activity is lower. As discussed above, numerous daily flights by commercial and private aircraft currently fly over the BCER and helicopters regularly land at a helipad located within the BCER next to the tidal inlet. Although the Applicant would provide daily formal briefings each day of the Airshow to all pilots about the sensitivity of BCER and would request avoidance of overflights over the area, the Project could increase the amount of air traffic that occurs over the Bolsa Chica Creek Ecological Reserve. Because pilots could be instructed by the FAA to fly over the BCER, preactivity surveys and biological monitoring will be conducted each year as part of the Project, at least one day prior to the Airshow as well as during the operation of the Airshow to determine whether Airshow activity is impacting bird behavior and to ensure that no Airshow- related debris drifts into sensitive ecological areas. Because pilots could be instructed by the Air Traffic Control (ATC) to fly over the BCER, preactivity surveys and biological monitoring will be conducted each year to determine whether Airshow activity is impacting bird behavior and to ensure that no Airshow-related debris drifts into the sensitive ecological areas. The specific monitoring efforts will include the following:
• A qualified biologist (familiar with nesting shorebirds and possessing all necessary permits) will conduct a preactivity survey of the areas with documented sensitive biological resources, including the BCER, areas known to support historic or existing state and/or federally listed species, such as the western snowy plover and California least tern, and the Show Center Area. These surveys will occur one day before any pre-Airshow activities and continue through every day of pre-Airshow and Airshow activities to observe baseline avian behavior and the effects of the Airshow on bird behavior.
• The qualified biological monitor will be present in areas with documented sensitive biological resources, including the BCER, areas known to support historic or existing state and/or federally listed species, such as the western snowy plover and California least tern, and the Show Center Area during the Airshow to monitor bird activity and reactions during the event. • If nests are found, the qualified biologist shall establish a 300-foot buffer for CEQA- or ESA- listed species and a 500-foot buffer for Fully Protected species. The buffer shall be between the Airshow activities, including presence of spectators, and the nest site. The buffer shall be delineated with construction fence, and signs shall be posted along the fence informing the public of the sensitive nature of the nesting site and indicating the area shall not be entered.

Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-7 ESA/202300046.01 Final Environmental Impact Report August 2025

• Trash and debris in the vicinity of nest sites or other sensitive habitats shall be removed by or at the discretion of the qualified biologist.
• During the 2023 Airshow, no noticeable change in avian behavior was observed and no California least tern or western snowy plover were observed. If a noticeable change in behavior (i.e., flushing or flying off) by state and/or federally listed species (e.g., western snowy plover, California least tern, and/or Belding’s savannah sparrow) is observed by the biological monitor resulting from flyovers during future Airshows, the monitor will consult with the City and the Applicant to propose an increase in flight elevation, recognizing that the FAA, flight controllers, and the pilots ultimately determine flight elevations. • Following the conclusion of the annual Airshow, the biological monitor will prepare a post- Airshow report to: (1) document observations, including reporting any relevant information to the CNDDB website and/or CDFW’s Vegetation Classification and Mapping Program (although the focus of the monitoring efforts is on avian species); (2) identify measures that were taken, as needed, to avoid potential impacts to nesting or sensitive species; and (3) provide recommendations for future Airshows. The report will be made available to the public on the City’s website.

3.2.5.2 Migratory Wildlife Corridors

The Project may temporarily impact wildlife movement within the BSA as a result of aircraft flyovers. This increased presence could disrupt local movement and displace wildlife within the BSA. Natural reserves and open space areas including BCER and the Huntington Beach Wetlands found to the north and south of the Show Center Area offer refuge for displaced wildlife utilizing upland habitats can disperse to other upland areas in the vicinity, and the temporarily impacted areas would not significantly inhibit local or regional movement of wildlife within these avoided areas of the BSA. Wildlife that is more sensitive to human disturbances and noise may be deterred by the Project related activities. The BCER is an important area in the Pacific Flyway for migratory birds species which are protected under the Migratory Bird Treaty Act of 1918 (MBTA, 16.U.S.C 703–712). The BCER is also under the protection of California Fish and Wildlife Code Section 630(17) of Title 14 (CDFW 2023c), which states that “no aircraft operations are permitted in a reserve, and low flyovers are in violation.” Sound pollution and repeated overhead flyovers can pose a threat to wildlife or harass wildlife species when they occur directly over an occupied area causing bird populations to take flight each time a plane or low flying aircraft fly over. While the proposed flight path to the Airshow Performance Area is planned to occur 500 to 1,000 feet west of the BCER, over the Pacific Ocean, a helicopter landing/runway display would occur on a temporary aircraft landing pad to be located within the Show Center Area during the hours of the Airshow. The Airshow Performance Area and the Show Center Area are located approximately 2.5 miles south of the BCER with performances scheduled to occur over the Pacific Ocean. Therefore, performances and flyovers will not take place directly over BCER. Also, during the Airshow, planes are expected to fly between 500 to 1,000 feet above MSL (as previously stated, most strikes occur below 500 feet) within the flight path to and from the Show Center Area. Aircraft would be instructed to avoid flying over BCER.

A majority of the flights planned for the Airshow would occur 1,000 feet above MSL and would only occur during the Airshow hours (between 10:00 AM and 5:00 PM). Additionally, the Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-8 ESA/202300046.01 Final Environmental Impact Report August 2025

operator will provide daily formal briefings each day of the Airshow to all operators on the sensitivity of BCER and request avoidance of overflights over the area. Because there is a chance that pilots could be planes are instructed by the ATC to fly over BCER, each year, preactivity surveys and biological monitoring will be conducted as part of the Project, at least one day prior to the pre-Airshow activities and during the operation of the Airshow to confirm if Airshow activity is impacting bird behavior, as well as watching that no Airshow-related debris drifts into sensitive ecological areas. The specific elements of the biological monitoring efforts are described under Section 3.2.5.1, Special-Status Birds. Thus, it is not anticipated that the Project will result in temporary indirect impacts to BCER.

Appendices
Appendix E, Aviation Noise Technical Report (December 2023) The most recent Noise Monitoring Technical Report dated December 2023, which contains the measurement data collected during the 2023 Airshow, was inadvertently omitted from Appendix E, of the Draft EIR. A previous version of the Noise Monitoring Technical Report dated September 2023 was included in the Draft EIR. While Table 1 in Appendix E from the September 2023 Noise Monitoring Technical Report presents modeled noise levels for individual aircraft, it does not reflect the full scope of observed conditions that were collected during the 2023 Airshow and were included in the analysis provided in Section 3.4 of the Draft EIR. To address this, the Noise Monitoring Technical Report dated December 2023, including all raw measurement data collected during the 2023 event, has been included and attached to the end of this Chapter. The previous version of the Noise Monitoring Technical Report dated September 2023 has been deleted. The replacement of the most recent Noise Monitoring Technical Report does not alter the analysis or conclusions of the Draft EIR.

4.2 Staff Initiated Text Changes
Chapter 2, Project Description
Section 2.6.5, Show Center Area Layout and Event Viewing

The Pier Seating Area (Area B) includes temporary seats for purchase and includes umbrellas, cocktail tables and two cash bars. All Pier Seating is landward of the State Lands Commission mean high tide line. Public access (for non-ticket holders) to the Pier would remain open during future Airshows. Only a portion of the The Pier would be reserved for seated ticketholders and pier ingress and egress would still be provided and would be open to the public before and after the event times each day. A 15-foot wide area would be provided and kept clear along the length of the pier for emergency vehicle access during event times each day. The Show Center Control Area located within the center of the Main Hospitality Area (Area D) includes the elevated show control and broadcast room, production and sound tents, and a public safety station. Following each future Airshow, the Show Center Area would be restored to pre-Project conditions.

Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-9 ESA/202300046.01 Final Environmental Impact Report August 2025

Section 2.6.7, Airshow Set Up and Site Breakdown

The Airshow set up would be limited to the Show Center Area. Set up of event facilities (i.e., tented pavilions, cabanas, tents, booths, tables, chairs, restroom trailers, portable bathrooms, barricades, runways, walkways, mobile security light towers, nighttime lighting for the potential music festival, speakers, and trash receptacles/dumpsters) is anticipated to begin up to two weeks prior to the start of the Airshow with a typical day of set up beginning at 6:00 AM and ending by 8:00 PM. All lighting would be low lumens, shielded, and directed away from the ocean to avoid impacts to marine life. In addition, the lifeguard towers within the Show Center Area would be temporarily relocated to other nearby areas of the beach by the City’s Public Works Department.

The relocation of the lifeguard towers would ensure there are clear lines of sight for Airshow operations staff in the Airshow Command Center and that the parachute landing zone would be cleared of any hazards or physical obstructions. Further, the Applicant would place 16 to 20 buoys offshore to properly designate the aerobatic box which must be clearly visible from the air per FAA and Department of Defense (DOD) regulations. The buoys would be large white inflatable buoys made from marine vinyl approximately 10’ x 10’ x 10’ in dimension. The buoys would be anchored to the sand-bottom sea floor (i.e., similar to how small vessels would anchor) using a 13-pound Danforth anchor with 10-foot chain with the required length of rope for the approximate 40-foot depth of ocean and sandy bottom. The buoys would be individually marked with strobe lights such that they could be clearly seen at night by vessels navigating the ocean.

The buoys would be deployed and lowered in the ocean by the City’s Marine Safety Division using a combination of lifeguard boats and personal watercraft to ensure proper placement and functionality and to manage throughout the Airshow.

Site breakdown would involve removal of all equipment and temporary facilities. Required equipment would include rubber-tired loaders, forklifts, pick-up trucks with trailers, 4-wheel drive all-terrain carts, and construction light towers. All materials, trash, and debris would be removed from the beach and disposed of off-site daily and at the conclusion of the Airshow. Site breakdown would begin on the final event day (Sunday) following the end of the Airshow from 5:00 PM through 12:00 AM and would continue on the Monday through Friday, from 6:00 AM to 8:00 PM, each day following the Airshow until completed. All lifeguard towers would be reinstated by the City’s Public Works Department to their original locations prior to the Airshow.

Further, the buoys would be retrieved by the City’s Marine Safety Division using a combination of lifeguard boats and personal watercraft following the conclusion of the Airshow.

Section 2.6.8, Event Security

The City of Huntington Beach Police Department (HBPD) would serve as the lead public safety agency for the Airshow. The HBPD would serve as a conduit to coordinate significant mutual aid and planning efforts with other public safety agencies including, but not limited to, the Federal Bureau of Investigation (FBI), Homeland Security, Orange County Intelligence Assessment Center (OCIAC), the Orange County Sheriff Department, U.S. Coast Guard, the FAA, and TRACON. In addition to foot and motor patrols provided by the City of Huntington Beach Police Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-10 ESA/202300046.01 Final Environmental Impact Report August 2025

Department (HBPD) during the event days, private security would also be provided by the Applicant. The private security company would coordinate crowd control, internal security, venue safety, and emergency evacuation in coordination with the HBPD. Compulsory bag and container checks would be required to ensure that no attendees bring in prohibited items onto the Huntington Beach Pier or into the ticketed venue areas for the duration of each Airshow day. In addition, HBPD motor officers and parking control officers would be deployed to maintain traffic flow along Pacific Coast Highway and to enforce parking restrictions in the vicinity. Fire and medical services would be provided by the Huntington Beach Fire Department (HBFD). Located throughout the venue are emergency vehicle staging areas and access lanes, first aid stations, and lost and found stations. Access lanes throughout the Show Center Area would be restricted for emergency vehicles and personnel throughout the Airshow.

Section 2.6.9, Utilities

Trash/waste (i.e., general waste/trash, recycling waste, food waste, restroom waste), water, and wastewater are the responsibility of the Applicant to work directly with the City for coordination and execution. Each year of the Airshow, the Applicant would prepare a Pollution Protection Plan as a condition of the annual Specific Event Permit for review and approval by the City.

Consistent with the City’s franchise agreement, the Applicant would contract and coordinate refuse needs with the City’s waste management provider, Republic Services. Republic Services would provide cardboard general waste and recycling bins with lids to be located throughout the Show Center Area including the reserved parking lot areas and would place dumpster bins in accordance with expected attendance. Dedicated food waste bins would be placed in the hospitality areas throughout the venue. The Applicant would be responsible to replace all full trash can liners throughout the venue and to place the trash from the bins into the dumpsters to then be removed by Republic Services following the conclusion of the Airshow. The Applicant would encourage all food vendors to avoid plastics (straws, cups, lids) and recommended to use paper straws or straw less lids. For non-potable water demand, the Applicant would use a water coupler to access the irrigation in the planters in the City’s parking lots for the Airshow’s parking lot activation activities. For potable water, the Applicant would bring in their own water tank and utilize it for filling the wave pool comprised of approximately 10,000 gallons, luxury restroom trailers, washing stations, and catering. The water tank would be filled using the City’s hydrants.

Alternatively, through an agreement with the Utilities Division in the Public Works Department of the City, a water meter could be installed on the hydrants in the City’s parking lots to allow the Airshow to connect directly into the hydrant for potable water to fill the Applicant’s water tank and to pay the event’s water bill according to Airshow usage on the meter. Restrooms available for the Airshow would consist of the existing restrooms, over one-hundred (100) portable and ADA compliant bathrooms, and several restroom trailers located throughout the venue. All restroom facilities would be cleaned and serviced at the conclusion of the Airshow each day. Each of the single portable restrooms would sit in a containment tray on top of plywood (or other suitable flooring) and would not be within 50 feet of an existing storm drain. Wastewater generated from the Airshow would be hauled off by the Applicant’s vendors (i.e., portable bathrooms and restroom trailers). Propane would be used for cooking and heating. Electrical power connections to the City’s electric grid would be provided throughout the venue.

Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-11 ESA/202300046.01 Final Environmental Impact Report August 2025

Chapter 3, Environmental Setting, Impacts, and Mitigation Measures
Section 3.3.5, Impact Analysis

3.3.5.1 Wildlife Hazard Analysis

Impact 3.3-1: For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, the project would not result in a safety hazard or excessive noise for people residing or working in the project area.

As previously mentioned in Section 3.3.5, most bird strike incidents occur during March through April and August through November when seasonal migration typically occurs. While birds are more likely to be struck during the day due to increased civil aircraft flight during the day (FAA 2023), seasonal migration is generally nocturnal. Airshow flights have historically occurred mid-day (between 10:00 AM and 5:00 PM.) which is when the majority of flights would occur.

Therefore, because a majority of no flights related to the Airshow are not planned to occur at night, the potential for impacts to aircraft from collisions with migratory birds are expected to be less than significant.

Chapter 4. Corrections and Additions to the Draft EIR
The Pacific Airshow Huntington Beach Project 4-12 ESA/202300046.01 Final Environmental Impact Report August 2025

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Appendix E
Aviation Noise Technical Report

PACIFIC AIRSHOW HUNTINGTON BEACH
Aviation Noise Monitoring Technical Report
December 2023

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PACIFIC AIRSHOW HUNTINGTON BEACH
Aviation Noise Monitoring Technical Report
December 2023

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OUR COMMITMENT TO SUSTAINABILITY | ESA helps a variety of public and private sector clients plan and prepare for climate change and emerging regulations that limit GHG emissions. ESA is a registered assessor with the California Climate Action Registry, a Climate Leader, and founding reporter for the Climate Registry. ESA is also a corporate member of the U.S. Green Building Council and the Business Council on Climate Change (BC3). Internally, ESA has adopted a Sustainability Vision and Policy Statement and a plan to reduce waste and energy within our operations. This document was produced using recycled paper.

Noise Monitoring Technical Report 1 ESA / 202300046.01
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TABLE OF CONTENTS
Page:
1 Introduction .................................................................................................................... 2 2 Fundamentals of Noise ................................................................................................. 2 3 Noise Monitoring ........................................................................................................... 8

3.1 Methodology ........................................................................................................... 8

3.2 Measurement Sites ............................................................................................... 10

3.3 Monitoring Results ................................................................................................ 13 Appendix A –Time History Graphs .................................................................................... A-1 Appendix B – Calibration Certificates ............................................................................... B-1 Appendix C – Airshow Schedule ....................................................................................... C-1

Tables:

Table 1. Common Sound on the A-Weight Decibel Scale ........................................................ 6 Table 2. Ambient Noise Levels (dB) ....................................................................................... 13 Table 3. Site M1 - Measured Events at Bolsa Chica Basin State Marine Conservation Area ...................................................................................................................... 13 Table 4. Site M2 – Measured Events at Pacific City Park ...................................................... 14 Table 5. Site M3 – Measured Events at Hyatt Regency Hotel ............................................... 15 Table 6. Site M4 – Measured Events at Pecan Avenue and 8th Street ................................. 16 Table 7. Site M7 – Measured Events at Huntington Beach City Hall ..................................... 17 Table 8. Site M9 – Measured Events at Peterson Elementary School................................... 18

Figures:

Figure 1. Common Sound on the A-Weighted Decibel Scale................................................... 5 Figure 2. Sound Exposure Level and Maximum Sound Level ................................................. 6 Figure 3. Example of Day Night Average Sound Level Calculation ......................................... 7 Figure 4. Measurement Site Locations for the 2023 Airshow ................................................... 9

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1 Introduction
The Pacific Airshow (Airshow) is an existing airshow performance comprised of civilian and military aircraft flybys and aerial acrobatics. Historically, the Airshow has attracted an estimate of up to hundred thousands of attendees. The Airshow is held annually for three (3) days during the fall season since 2016, generally between 7th Street and Beach Boulevard (SR -39) in the City of Huntington Beach (City), California, except in 2020 during the COVID -19 pandemic. During the 2021 Airshow, an unrelated oil s pill from a pipeline leak off the Orange County coast resulted in the cancelation of the final day to allow for cleanup efforts. In 2023, the Airshow took place from September 29 to October 1.

In response, ESA is assisting the City with developing a noise analysis to evaluate and document potential noise exposure related to the 2023 Airshow. This analysis is focused on attended noise monitoring that took place during the Airshow to determine potential effects within the City due to performing aircraft. This technical report provides a foundation intended to facilitate conversations between the City and its surrounding neighborhoods related to the contributions of the aircraft operations to the local noise environment during the airshow . It provides an overview of the fundamentals of noise, noise monitoring sites, noise monitoring protocols, and monitoring results. 2 Fundamentals of Noise
This section presents fundamental terminology and noise metrics most commonly used to quantify noise. Noise metrics can be categorized into two primary types: (1) those describing isolated noise events, referred to as single- event metrics, and (2) metrics that gauge the overall noise exposure over a specified duration, referred to as cumulative noise metrics. Single -event metrics provide insights into the intrusiveness, loudness, or overall disturbance caused by individual aircraft or helicopter noises while cumulative metrics serve as indicators of community annoyance.

Environmental Noise Fundamentals
The measurement and human perception of sound involve two basic physical characteristics:
intensity and frequency. Intensity is a measure of the acoustic energy of sound vibrations, expressed in terms of sound pressure. The higher the sound pressure, the m ore energy carried by the sound and the louder the perception of that sound. The second important physical characteristic is sound frequency, which is the number of times per second the air vibrates or oscillates. Low -frequency sounds are characterized as rumbles or roars, while high-frequency sounds are typified by sirens or screeches.

Sound, traveling in the form of waves from a source, exerts a sound pressure level (referred to as sound level), which is measured in decibels (dB). On this scale, zero dB corresponds roughly to the threshold of human hearing and 120 to 140 dB corresponds to the threshold of pain. Pressure waves traveling through air exert a force registered by the human ear as sound. Noise is commonly defined as unwanted sound.

Sound pressure fluctuations can be measured in units of hertz (Hz), which correspond to the frequency of a particular sound. Typically, sound does not consist of a single frequency, but rather a broad band of frequencies varying in levels of magnitude (sound power). When all the audible frequencies of a sound are measured, a sound spectrum is plotted consisting of a range of frequencies

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spanning 20 to 20,000 Hz. The sound pressure level, therefore, constitutes the additive force exerted by a sound corresponding to the sound frequency/sound power level spectrum.

The typical human ear is not equally sensitive to all frequencies of the audible sound spectrum. As a consequence, when assessing potential noise impacts on humans, sound is measured using an electronic filter that de-emphasizes the frequencies below 1,000 Hz and above 5,000 Hz in a manner corresponding to the human ear’s decreased sensitivity to extremely low and extremely high frequencies. This method of frequency weighting is referred to as A-weighting and is expressed in units of A-weighted decibels (dBA). A-weighting follows an international standard methodology of frequency weighting and is typically applied to community noise measurements.

General Characteristics of Aircraft Noise
Outdoor sound levels decrease as a function of distance from the source and as a result of wave divergence, atmospheric absorption, and ground attenuation. If sound is radiated from a source in a homogenous and undisturbed manner, the sound travels as sphe rical waves. As the sound wave travels away from the source, the sound energy is distributed over a greater area, dispersing the sound power of the wave. Spherical spreading of the sound wave reduces the noise level, for most sound sources, at a rate of 6 dB per doubling of the distance.

Atmospheric absorption also influences the levels that are received by the observer. The greater the distance sound travels, the greater the influence of atmospheric effects. Atmospheric absorption becomes important at distances of greater than 1,000 feet. The degree of absorption is a function of the sound frequency, as well as the humidity and temperature of the air. For example, atmospheric absorption is lowest at high humidity and higher temperatures. Turbulence and gradients of wind, temperature, and h umidity also play a significant role in determining the degree of attenuation.

Certain conditions, such as inversions, can also result in higher sound levels that would result from spherical spreading as a result of channeling or focusing the sound waves.

Absorption effects in the atmosphere vary with frequency. The higher frequencies are more readily absorbed than the lower frequencies. Over large distances, the lower frequencies become the dominant sound as the higher frequencies are attenuated.

The effects of ground attenuation on aircraft noise propagation are a function of the height of the source and/or receiver and the characteristics of the terrain. The closer the source of the noise is to the ground, the greater the ground absorption. Terrain consisting of soft surfaces, such as vegetation, provides for more ground absorption than hard surfaces, such as a large parking lot.

Aircraft noise originates from both the engines and the airframe of an aircraft, but the engines are, by far, the more significant source of noise. Meteorological conditions affect the transmission of aircraft noise through the air. Wind speed and direction, and the temperature immediately above ground level, cause diffraction and displacement of sound waves. Humidity and temperature materially affect the transmission of air -to-ground sound through absorption associated with the instability and viscosity of the air.

Aircraft Noise Descriptors
The description, analysis, and reporting of aircraft noise levels is made difficult by the complexity of human response to sound and the myriad of sound- rating scales and metrics that have been

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developed for describing acoustic effects. Various rating scales have been devised to approximate the human response to the “loudness” or “noisiness” of a sound. Noise metrics have been developed to account for additional parameters, such as duration and cumulative effect of multiple events.

Noise metrics can be categorized as single- event metrics and cumulative metrics. Single- event metrics describe the noise from individual events, such as an aircraft flyover. Cumulative metrics describe the noise in terms of the total noise exposure over a period of time.

A-Weighted Sound Pressure Level (dBA)
The decibel is a unit used to describe sound pressure level. When expressed in dBA, the sound has been filtered to reduce the effect of very low and very high frequency sounds, much as the human ear filters sound frequencies. Without this filtering, calcul ated and measured sound levels would include events that the human ear cannot hear (e.g., dog whistles and low frequency sounds, such as the groaning sounds emanating from large buildings with changes in temperature and wind). With A-weighting, calculation s and sound monitoring equipment approximate the sensitivity of the human ear to sounds of different frequencies.

Some common sound levels on the dBA scale are listed in Figure 1. As shown, the relative perceived loudness of a sound doubles for each increase of 10 dBA, although a 10 -dBA change in the sound level corresponds to a factor of 10 changes in relative sound energy. Generally, single - event sound levels with differences of 2 dBA or less are not perceived to be noticeably different by most listeners.

Maximum A-Weighted Level (Lmax)
Lmax is the maximum, or peak, sound level during a noise event. The metric only accounts for the highest A-weighted sound level measured during a noise event, not for the duration of the event.

For example, as an aircraft approaches, the sound of the aircraft begins to rise above ambient levels.

The closer the aircraft gets, the louder the sound until the aircraft is at its closest point. As the aircraft passes, the sound level decreases until the sound returns to ambient levels. Some sound level meters measure and record the maximum sound level (Lmax). The Lmax for an aircraft flyover is illustrated on Table 1.

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Figure 1. Common Sound on the A-Weighted Decibel Scale

COMMON OUTDOOR

SOUND LEVELS
Power Mower g6 dBA'
Heavy City Traffic 92 dBA'
Motorcycle at 25 feet 90 dBA'
Busy Urban Street 90 dBA'
Car Wash (at 20 feet) 89 dBA'
Diesel Truck (40 mph at 50 feet) 84 dBA'
High Urban Ambient Sound So dBA'
Freeway Traffic (at 50 feet) 76 dBA'
Air Conditioning Unit (at 100 feet) 60 dBA'
Quiet Suburb (Daytime) 50 dBA'
Bird Calls 44 dBA'
Lowest Limit of Urban Ambient Sound 40 dBA'
Quiet Rural Nighttime 30 dBA'
Rustling Leaves 20 dBA'

NOISE LEVEL
(dBA)
1 Aviation Noise Effects . FAA. AEE. March. 1985 (FAA- EE-85 -2). Table 1.1

COMMON INDOOR

SOUND LEVELS
111 dBA' Rock Band
100 dBA3 Subway
88 dBA' Food Blender
So dBA' Garbage Disposal
So dBA' Ringing Alarm Clock (at 2 feet)
69 dBA' Vacuum Cleaner (at 10 feet)
65 dBA' Busy Restaurant
60 dBA' Conversational Speech in Restaurant
50 dBA' Conversation in Living Room
40 dBA' Library
40 dBA' Soft Background Music
34 dBA' Soft Whispers (at 5 feet)
32 dBA' Room in a quiet dwelling at midnight
o dBA• Threshold of Hearing
2 Fede ral Agency Review of Selected Airport Noise Analysis Issues (Fede ral lnteragency Committee on Noise), August 1992, Table B.l 3 Children's health and t he environment. A Global Perspect ive. World Health Organization . 2005. Table 15.1 4 OSHA Tec hni cal Manual. TED 01-00-015. Sect ion Ill (Hea lth Hazards). Chapter 5 (Noise. Updated 8/15/20 13) Source: Environmental Science Associa t es, 2023.

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Table 1. Common Sound on the A-Weight Decibel Scale
Sound
Sound level
(dBA)
Relative loudness
(approximate)
Relative sound
energy
Rock music, with amplifier 120 64 1,000,000
Thunder, snowmobile (operator) 110 32 100,000
Boiler shop, power mower 100 16 10,000
Orchestral crescendo at 25 feet, noisy kitchen 90 8 1,000 Busy street 80 4 100
Interior of department store 70 2 10
Ordinary conversation, 3 feet away 60 1 1
Quiet automobiles at low speed 50 1/2 .1
Average office 40 1/4 .01
City residence 30 1/8 .001
Quiet country residence 20 1/16 .0001
Rustle of leaves 10 1/32 .00001
Threshold of hearing 0 1/64 .000001

SOURCE: U.S. Department of Housing and Urban Development, Aircraft Noise Impact—Planning Guidelines for Local Agencies, 1972.

Sound Exposure Level (SEL)
Sound Exposure Level (SEL), is a time integrated measure, expressed in decibels, of the sound energy of a single noise event at a reference duration of one second. The sound level is integrated over the period that the level exceeds a threshold. Therefore, SEL accounts for both the maximum sound level and the duration of the sound. The standardization of discrete noise events into a one second duration allows calculation of the cumulative noise exposure of a series of noise events that occur over a period of time. The SEL of an aircraft noise event is typically 6 to 12 dBA greater than the Lmax of the event. SELs for aircraft noise events depend on the location of the aircraft relative to the noise receptor, the type of operation (landing, takeoff, or overflight), and the type of aircraft.

The SEL for an aircraft flyover is illustrated in Figure 2.

Figure 2. Sound Exposure Level and Maximum Sound Level
SOURCE: ESA

One Second
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SEL = 108 dB
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Time (seconds)

Noise Monitoring Technical Report 7 ESA / 202300046.01
Pacific Airshow Huntington Beach December 2023
Equivalent A-Weighted Noise Level (Leq)
Leq is the sound level corresponding to a steady state, A-weighted sound level containing the same total energy as a time-varying signal over a given sample period. Leq is the “energy” average noise level during the time period of the sample. It is based on the observation that the potential for a noise to impact people is dependent on the total acoustical energy content of the noise. It is the energy sum of all the sound that occurs during that time period. This is graphically illustrated in the middle graph on Figure 2. Leq can be measured for any time period, but is typically measured for 15 minutes, 1 hour, or 24 hours.

Leq is also used to represent average daytime and nighttime noise levels. Daytime Leq is the 15- hour average sound level for each one hour between 7 a.m. to 10 p.m. Nighttime Leq is the 9-hour average sound level for each one hour between 10 p.m. to 7 a.m.

Day-Night Average Sound Level (DNL or Ldn)
The Day-Night Average Sound Level (DNL or Ldn) represents a 24-hour A-weighted noise dose as presented in Figure 3. DNL is essentially equal to the 24-hour A-weighted Leq, with one important adjustment: noise occurring at night – from 10 p.m. through 7 a.m. – is “factored up.” The factoring up can be made in one of two ways:

1. Weighting, by counting each nighttime noise contribution 10 times; e.g., if DNL is calculated by summing the SEL of aircraft operations over a 24-hour period, each nighttime operation is represented by 10 identical daytime operations.

2. Penalizing, by adding 10 dB to all nighttime noise contributions; e.g., if DNL is calculated from the SEL of aircraft operations occurring over a 24-hour period, 10 dB are added to the SEL values for nighttime operations.

The 10 dB adjustment accounts for our greater sensitivity to nighttime noise and the fact lower ambient levels at night tend to make noise events, such as aircraft flyovers, more intrusive. Figure 3 depicts this adjustment graphically.

Figure 3. Example of Day Night Average Sound Level Calculation SOURCE: ESA

80 - -- - - --- - - ------ - ------ - - -- - ---- ---- - --- - -- - - - -· - -- - ---- - -- - - - - - DNL=66dB
30-+----1----+----+-----+---+----,----+-----I
7am 10am 1pm 4pm 7pm 10pm 1am 4am 7am
1-------D ay ------------,1---- Night-----l
Time of Day

Noise Monitoring Technical Report 8 ESA / 202300046.01
Pacific Airshow Huntington Beach December 2023
3 Noise Monitoring
The following sections outline the noise monitoring methodology and results. This includes an overview of the noise monitoring locations, description of the noise monitoring equipment utilized and its setup, aircraft overflight event correlation, and noise level results.

3.1 Methodology
ESA conducted short-term, attended noise monitoring during the 2023 Airshow. Measurement sites were chosen based on proximity of residential, mixed use, municipal, and conservational land uses throughout the City. The site selections are shown in Figure 4 and photos of each location are found in
Section 3.2 Measurement Sites.

ESA deployed a Larson Davis Model 831 Sound Level Meter (SLM) at three sites over a two-day period on September 29th and 30th, 2023. All instrumentation conforms to ANSI (American National Standard Institute) Standard S1.4 for Type 1 precision, the highest level of precision, with current calibrations traceable to the U.S. National Institute of Standards and Technology (NIST). Type 1 precision instrumentation requires constant calibration to meet ANSI standards ; calibrations were carried out in the field be fore and after the measurement period using NIST-certified calibration devices. Calibration certificates are found in
Appendix B.

Continuous one-second Leq measurement data was obtained for the duration of the Airshow. ESA personnel monitored each site and noted aircraft flyovers and any notable community noise events (e.g. police sirens, ambulances, lawn mowing). For the purpose of analyzing the measurement data, each performance was considered a single noise event due to the overlapping noise signatures that resulted from the high frequency of aircraft pass- bys. The measurement data was split into events based on the performance schedule provided to ESA by th e City, and each performance was reviewed by ESA. The time-history data in conjunction with the notes taken by observers during the Airshow were used to determine an appropriate noise threshold for each performance. Any noise exceeding the threshold for a given performance was considered to be aircraft noise, and any noise not exceeding the threshold was considered to be ambient or “community” noise. Aircraft SEL and Lmax were then computed based on these parameters.

It is important to note that the noise monitoring results presented in this report should not be compared to noise measurements made using less precise instrumentation, such as cell phone applications. Cellphone microphones do not conform to ANSI or NIST standard for several reasons. (1) the built -in microphones found in cellphones have limitations due to their miniature size and circuit board placement, which affect their dynamic range and signal -to-noise ratio, (2) another constraint of built -in microphones is the lack of access and inability to perform periodic or pre- measurements and (3) the placement of the microphone can affect measured sound levels. (It is imperative that microphones be placed away from trees, walls, and structures as sound reflecting off surfaces will increase the sound levels measured.)

Service Layer Credits: Source: Esri, Maxar,
Earthstar Geographics, and the GIS User
Community
!(!(
!(
!(
!(
!(
City of Huntington Beach
Modeled Flight Track
ST1
ST39
ST1
ST39
Newland St
Adams Ave
Yorktown Ave
Brookhurst St
Main St
Placentia Ave
Victoria St
Garfield Ave
Atlanta Ave
Ellis Ave
17th St
Orange Ave
Warner Ave
11th St
Hamilton Ave
Talbert Ave
E Adams Ave
Memphis Ave
1st St
Adams Ave Garfield Ave
Brookhurst St
Main St
Goldenwest St
Magnolia St
M1
M7
M9
M4
M3 M2
Path: U:\GIS\GIS\Projects\2023xxx\D202300046_00_Huntington_Beach_Air_Show_EIR\03_Project\MXD\Fig9_Measurement_Locations_v1.mxd,  CNottoli  10/19/2023 SOURCE: AEDT 3e; ESA, 2023.

Legend
!(
Noise Measurement
Locations
Modeled Flight Track
Airshow Performance
Area
City of Huntington
Beach
PAHB Noise Contour Analysis
Figure 4
Noise Measurement Locations for the 2023 Airshow
Pacific Airshow Huntington Beach
0 2,500
Feet
±

AIRSHOW PERFORMANCE AREA
Notes:

M1: Bolsa Chica Basin State Marine Conservation Area
M2: Pacific City Park
M3: Hyatt Regency/Residential
M4: Residential
M7: City Hall
M9: Peteron Elementary School

Noise Monitoring Technical Report 10 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

3.2 Measurement Sites

3.2.1 Site M1 – Bolsa Chica Basin State Marine Conservation Area Bolsa Chica Basin State Marine Conservation Area Site M1 is located approximately four miles north of Downtown Huntington Beach and directly east of Pacific Coast Highway. Attended measurements were conducted at this site on Friday, September 29 th, 2023 for the scheduled duration of the Airshow. Roadway noise was the predominate community noise source observed at this site.

3.2.2 Site M2 – Pacific City Park
Pacific City Park Site M2 is located approximately in Downtown Huntington Beach behind the Pacific City Shopping Center on Pacific View Avenue. Attended measurements were conducted at this site on Saturday, September 30
th, 2023, for the scheduled duration of the Airshow. Roadway noise was the predominate community noise source observed at this site.

Noise Monitoring Technical Report 11 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

3.2.3 Site M3 – Hyatt Regency Hotel
Hyatt Regency Hotel S ite M3 was located on the corner of Pacific View Avenue and Beach Boulevard. Attended measurements were conducted at this site on Saturday, September 30th, 2023, for the scheduled duration of the Airshow. Roadway noise was the predominate community noise source observed at this site.

3.2.4 Site M4 – Pecan Avenue and 8th Street
Residential Site M4 was located on the corner of Pecan Avenue and 8 th Street. Attended measurements were conducted at this site on Saturday, September 30 th, 2023, for the scheduled duration of the Airshow. Ambient community noise included roadway, pedestrian, and construction events at this site.

Noise Monitoring Technical Report 12 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

3.2.5 Site M7 – Huntington Beach City Hall
City Hall Site M7 was located in the open area along Park Street on the premise of the municipal buildings. Attended measurements were conducted at this site on Friday, September 29th, 2023, for the scheduled duration of the Airshow. Occasional police sirens were the predominate community noise source observed at this site.

3.2.6 Site M9 – Peterson Elementary School
Site M9 was located on the corner of Farnsworth Lane and Kingfisher Drive, directly south of Peterson Elementary School. Attended measurements were conducted at this site on Friday, September 29 th, 2023, for the scheduled duration of the Airshow. Ambient community noise included roadway, pedestrian, and construction events at this site.

Noise Monitoring Technical Report 13 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

3.3 Monitoring Results
The short-term monitoring equipment measured noise levels continuously over the course of the Airshow on September 29 th and 30 th, 2023. The instruments were programmed to record slow - response broadband A -weighted sound levels in one -second intervals. Ambient noise monitoring results during the Airshow are summarized in on Table 2. The ambient noise conditions throughout the City (Sites M1, M4, M7, and M9) range from 51.2 and 52.7 dB. The ambient noise conditions at Sites M2 and M3 at 55.0 dB and 57.8 dB, respectively, are higher because these sites are located along Pacific View Avenue and are influenced by roadway noise.

Table 2. Ambient Noise Levels (dB)
M1 M2 M3 M4 M7 M9

51.7 55.0 57.8 52.7 51.2 51.2

SOURCE: ESA, 2023

Table 3 through Table 8 present the measured events observed at each site that was logged in the datasheets. Additional details on each flight can be found in the performer schedule in A ppendix
C. As mentioned in Section 2, Lmax is the peak sound level during a noise event while SEL expresses the sound energy of a single noise event over the duration of one (1) second. Therefore, the SEL of a noise event may be 6 to 12 dBA greater than the Lmax of the same noise event.

Ta
ble 3 presents the measured events at Site M1, Bolsa Chica Basin State Marine Co nservation Area. The loudest Lmax and SEL were associated to the Thunderbirds Diamond Practice at 100.1 and 109.4 dB, respectively. The quietest Lmax event was attributed to the Army Helicopters at 70.8 dB with and associated SEL of 79.3 dB. The quietest SEL event was attributed to the Trump Boeing 757 at 78.2 dB with and associated Lmax of 71.7 dB. The ambient background noise on the day of these events was between 50.1 and 54.0 dB.

Table 3. Site M1 - Measured Events at Bolsa Chica Basin State Marine Conservation Area Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/29/2023 9:27 AM Thunderbirds
Diamond
Practice
54 100.1 109.4
9/29/2023 11:07 AM USN Growler 23 77.7 88.3
9/29/2023 11:30 AM Trump B757 7 71.7 78.2
9/29/2023 11:51 AM Snowbirds 42 76.7 90.4
9/29/2023 12:45 PM USN F35C 15 79.6 92.3
9/29/2023 1:21 PM Army
Helicopters
6 70.8 79.3
9/29/2023 1:33 PM Army Golden
Knights
11 74.1 80.6
9/29/2023 1:47 PM USN Growler 12 91.4 96.2
9/29/2023 2:20 PM USAF
Heritage
40 88.7 102.0
9/29/2023 3:36 PM Thunderbirds 45 94.3 106.4

SOURCE: ESA, 2023

Noise Monitoring Technical Report 14 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Table 4 presents the measured events at Site M2, Pacific City Park . The loudest Lmax and SEL were associated to the USAF Heritage flight at 112.5 and 124.9 dB, respectively. The quietest Lmax event was attributed to the OC Water Drop at 63.6 dB with and associated SEL of 77.8 dB. The quietest SEL event was attributed to the CA ANG C130 at 74.5 dB with and associated Lmax of

64.0 dB. The ambient background noise on the day of these events was between 51.3 and 57.9 dB.

Table 4. Site M2 – Measured Events at Pacific City Park Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/30/2023 9:57 AM F15 Takeoff
From SLI
13 85.6 98.7
9/30/2023 10:10 AM OC Water
Drop
4 63.6 77.8
9/30/2023 10:30 AM USAF F15 4 100.0 111.0
9/30/2023 10:36 AM Sammy
Mason
12 84.8 97.5
9/30/2023 10:49 AM Ace Maker x2 10 77.3 90.1
9/30/2023 11:02 AM Subsonex 11 81.3 94.4
9/30/2023 11:14 AM USN F18
Rhino
13 107.9 117.9
9/30/2023 11:29 AM CA ANG
C130
6 64.0 74.5
9/30/2023 11:35 AM Lyon Air
Museum C47
7 66.1 82.0
9/30/2023 11:44 AM Snowbirds 30 87.8 99.8
9/30/2023 12:34 PM USN F35C 15 108.3 119.9
9/30/2023 12:51 PM Michael
Goulian
11 89.1 102.3
9/30/2023 1:03 PM FedEx B757 8 98.9 105.3
9/30/2023 1:10 PM USN Growler 10 107.0 119.1
9/30/2023 1:21 PM Red Bull Helo 13 71.4 88.3
9/30/2023 1:34 PM USAF F15 3 102.1 109.9
9/30/2023 1:41 PM USAF KC135 2 73.6 84.4
9/30/2023 3:25 PM USAF
Heritage
42 112.5 124.9

SOURCE: ESA, 2023

Noise Monitoring Technical Report 15 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Table 5 presents the measured events at Site M3, Hyatt Regency Hotel. The loudest Lmax and SEL were associated to the USAF F22 at 111.0 and 123.4 dB, respectively. The USN Growler also had the loudest Lmax at 111.0 dB with an associated SEL of 117.1 dB, the second loudest SEL at M3.

The quietest events, attributed to the OC Water Drop , had an Lmax and SEL of 74.3 and 87.1 dB, respectively. The ambient background noise on the day of these events was between 55.0 and 60.4 dB.

Table 5. Site M3 – Measured Events at Hyatt Regency Hotel Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/30/2023 9:57 AM F15 Takeoff
From SLI
13 89.8 101.2
9/30/2023 10:10 AM OC Water
Drop
4 74.3 87.1
9/30/2023 10:22 AM Leap Frogs 8 77.8 91.4
9/30/2023 10:30 AM USAF F15 4 88.2 99.6
9/30/2023 10:36 AM Sammy
Mason
12 88.0 100.7
9/30/2023 10:49 AM Ace Maker x2 10 85.9 94.5
9/30/2023 11:02 AM Subsonex 11 81.5 95.6
9/30/2023 11:14 AM USN F18
Rhino
13 107.9 114.9
9/30/2023 11:44 AM Snowbirds 30 98.0 104.6
9/30/2023 12:34 PM USN F35C 15 107.1 116.1
9/30/2023 12:51 PM Michael
Goulian
11 100.4 102.6
9/30/2023 1:03 PM FedEx B757 8 91.0 97.7
9/30/2023 1:10 PM USN Growler 10 111.0 117.1
9/30/2023 1:21 PM Red Bull Helo 13 84.1 96.0
9/30/2023 1:34 PM USAF F15 3 98.1 104.8
9/30/2023 1:41 PM USAF KC135 2 78.7 88.5
9/30/2023 3:25 PM USAF F22 42 111.0 123.4

SOURCE: ESA, 2023

Noise Monitoring Technical Report 16 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Table 6 presents the measured events at Site M4, Pecan Avenue and 8th Street. The loudest Lmax and SEL were associated to the USAF Heritage at 119.3 and 124.4 dB, respectively. The quietest Lmax event was attributed to the Subsonex at 73.1 dB with an associated SEL of 86.9 dB. The quietest SEL event was attributed to the USAF KC135 at 83.5 dB with and associated Lmax of 79.9 dB. The ambient background noise on the day of these events was between 50.9 and 57.3 dB.

Table 6. Site M4 – Measured Events at Pecan Avenue and 8th Street Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/30/2023 9:57 AM
F15 Takeoff
From SLI 13 84.9 97.3
9/30/2023 10:30 AM USAF F15 4 96.9 104.3
9/30/2023 10:36 AM
Sammy
Mason 12 75.8 91.7
9/30/2023 10:49 AM Ace Maker x2 10 76.7 89.7
9/30/2023 11:02 AM Subsonex 11 73.1 86.9
9/30/2023 11:14 AM
USN F18
Rhino 13 110.7 115.1
9/30/2023 11:44 AM Snowbirds 30 81.3 93.2
9/30/2023 12:34 PM USN F35C 15 116.6 120.7
9/30/2023 12:51 PM
Michael
Goulian 11 81.6 95.9
9/30/2023 1:03 PM FedEx B757 8 92.4 99.4
9/30/2023 1:10 PM USN Growler 10 106.8 115.2
9/30/2023 1:34 PM USAF F15 3 94.1 102.4
9/30/2023 1:41 PM USAF KC135 2 79.9 83.5
9/30/2023 3:25 PM
USAF
Heritage 42 119.3 124.4

SOURCE: ESA, 2023

Noise Monitoring Technical Report 17 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Table 7 presents the measured events at Site M4, Huntington Beach City Hall. The loudest Lmax event was attributed to the USN F35C at 112.8 dB with an associated SEL of 118.2 dB. The loudest SEL event was attributed to the USAF Heritage flight at 120.2 dB with an associated Lmax of 111.2 dB. The quietest event, attributed to the USAF KC135, had an Lmax and SEL of 61.6 and 75.3 dB, respectively. The ambient background noise on the day of these events was between 47.8 and 52.8 dB.

Table 7. Site M7 – Measured Events at Huntington Beach City Hall Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/29/2023 9:27 AM Thunderbirds
Diamond
Practice
54 99.7 108.6
9/29/2023 10:32 AM Sammy
Mason
9 78.0 90.2
9/29/2023 10:42 AM Ace Maker 14 71.4 84.8
9/29/2023 10:58 AM Subsonex 9 78.7 90.7
9/29/2023 11:07 AM USN Growler 23 95.5 106.2
9/29/2023 11:51 AM Snowbirds 42 88.5 102.0
9/29/2023 12:45 PM USN F35C 15 112.8 118.2
9/29/2023 1:00 PM Matt and
Emma
11 68.6 82.8
9/29/2023 1:12 PM FedEx B757 7 67.8 79.6
9/29/2023 1:21 PM Army
Helicopters
6 65.8 78.6
9/29/2023 1:47 PM USN Growler 12 94.3 107.8
9/29/2023 2:12 PM USAF KC135 6 61.6 75.3
9/29/2023 2:20 PM USAF
Heritage
40 111.2 120.2
9/29/2023 3:11 PM Michael
Goulian
11 68.4 84.8
9/29/2023 3:24 PM Jet Waco 10 71.0 85.0
9/29/2023 3:36 PM Thunderbirds 45 94.9 108.2

SOURCE: ESA, 2023

Noise Monitoring Technical Report 18 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Table 8 presents the measured events at Site M9, B Peterson Elementary School. The loudest Lmax and SEL were associated to the Thunderbirds at 125.1 and 128.5 dB, respectively. The quietest event, attributed to the Army Helicopters, had an Lmax and SEL of 66.5 and 76.1 dB, respectively.

The ambient background noise on the day of these events was between 48.4 and 58.1 dB.

Table 8. Site M9 – Measured Events at Peterson Elementary School Date Time
Performer Duration
(Minutes)
Lmax
(dB)
SEL
(dB)
9/29/2023 9:27 AM Thunderbirds
Diamond
Practice
54 119.9 124.0
9/29/2023 10:30 AM Leap Frogs
Flag Jump w
USA Anthem
2 71.7 85.4
9/29/2023 10:32 AM Sammy
Mason
9 76.4 87.6
9/29/2023 10:42 AM Ace Maker 14 83.7 93.1
9/29/2023 10:58 AM Subsonex 9 86.8 98.0
9/29/2023 11:07 AM USN Growler 23 107.8 112.9
9/29/2023 11:51 AM Snowbirds 42 98.8 109.6
9/29/2023 12:45 PM USN F35C 15 94.0 105.7
9/29/2023 1:00 PM Matt and
Emma
11 78.0 87.9
9/29/2023 1:21 PM Army
Helicopters
6 66.5 76.1
9/29/2023 1:33 PM Army Golden
Knights
11 74.4 88.0
9/29/2023 1:47 PM USN Growler 12 103.0 113.4
9/29/2023 2:00 PM Red Bull Helo 7 76.5 86.1
9/29/2023 2:12 PM USAF KC135 6 81.0 88.4
9/29/2023 2:20 PM USAF
Heritage
40 110.2 120.1
9/29/2023 3:11 PM Michael
Goulian
11 84.2 94.1
9/29/2023 3:24 PM Jet Waco 10 85.8 95.7
9/29/2023 3:36 PM Thunderbirds 45 125.1 128.5

SOURCE: ESA, 2023

The data shows that the loudest aircraft , regarding Lmax and SEL, across all sites were the Thunderbird, USAF Heritage, and USAF F22. The loudest Lmax recorded ranged from 100.1 , which is roughly equivalent to a powered mower and 125.1 dB , equivalent to a rock concert, as shown in Table 1. The loudest SELs ranged from 109.4 to 128.5 dB. As shown in Appendix A,
these events are intermittent due to the nature of each flyby and are not sustained noise levels.

Noise Monitoring Technical Report A-1 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Appendix A –Time History Graphs

Noise Monitoring Technical Report A-2 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M1- Bolsa Chica Basin State Marine Conservation Area Thunderbirds diamond practice
120 -------------------------~
115
110
105
100
95 en 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 109.4
ircraft Lmax : 100.1
mbient Leq : 51.5
LAeq
Thresho ld
55 t-::--f----:-h--thll-1f-:.---Tt1t---+tHlt+-H _..,Hl-lt ~ -HfHrlll H t11-, 50 45
40 -+-~ ~-~--~-~ - ~--~--~ - ----1--~ - -.-<
09:35 09:40 09:45 09:50 09:55 10:00 10:05 10:10 10:15 10:20 Time
USN Growler
120 -------------------------~
115
110
105
100
95 en 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 88.3
ircraft Lmax : 77.7
mbient Leq : 50 . 7
LAeq
Thresho ld
40 +---~-----~- - --~----- ~--- --j
11:10 11:15 11:20
Time
11:25 11:30

Noise Monitoring Technical Report A-3 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 78 .2
110 ire raft Lmax: 71. 7
105 mbient Leq: 51.4
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C:
::,
0 "' 70
65 60
55 50
45 40
11:30 11:31 11:32
120
115 ircraft SEL: 90.4
110 ire raft Lmax: 76. 7
105 mbient Leq: 51.4
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C:
::,
0 "' 70
65 60
55 50
45 40
11:55 12:00 12:05
Trump B757
11:33 11:34
Time
Snowbirds
11:35
LAeq
Threshold
11:36 11:37
LAeq
Threshold
12:10 12:15 12:20 12:25 12:30
Time

Noise Monitoring Technical Report A-4 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 92.3
110 ircraft Lmax : 79 .6
105 mbient Leq: 51.2
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C:
::,
0 "' 70
65 60
55 50
45 40
12:46 12:48
120
115 ircraft SEL: 79.3
110 ircraft Lmax : 70.8
105 mbient Leq: 51.4
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C:
::,
0 "' 70
65 60
55 50
45 40
13:21 13:22
12:50
13:23
USN F35C
12:52
Time
12:54 12:56
Army Helos
13:24 13:25
Time
LAeq
Thres hold
12:58 13:00
LAeq
Thresho ld
13:26 13:27

Noise Monitoring Technical Report A-5 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 80.6
110 ircraft Lmax : 74.1
105 mbient Leq: 50.1
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:34 13:36
120
115 ircraft SEL: 96.2
110 ircraft Lmax : 91.4
105 mbient Leq: 52.8
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:48 13:50
Army Golden Knights
13:38
Time
13:40
USN Growler
13:52 13:54
Time
LAeq
Threshold
13:42 13:44
13:56
LAeq
Threshold
13:58

Noise Monitoring Technical Report A-6 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

120
115 ircraft SEL: 102.0
110 ire raft Lmax : 88. 7
105 mbient Leq: 52.2
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
14:20 14:25 14:30
USAF Heritage
LAeq
Threshold
14:35 14:40 14:45 14:50 14:55 15:00
Time
Thunderbirds
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; >
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 106.4
ircraft Lmax: 94.3
mbient Leq: 54.0
LAeq
Threshold
40 +---+--~--~-~-r----r----r--- "-r---~----,-i
15:40 15:45 15:50 15:55 16:00 16:05 16:10 16:15 16:20
Time

Noise Monitoring Technical Report A-7 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M2 - Pacific City Park
120
115 ircraft SEL: 98. 7
110 ircraft Lmax : 85.6
105 mbient Leq: 53.0
100
95 'in 90
~ 85 -.:; > 80 ~
"Cl
75 C:
::,
0 "' 70
65 60
55 50
45 40
09:58 10:00
120
115 ircraft SEL: 77.8
110 ircraft Lmax: 63.6
105 mbient Leq: 53.1
100
95 'in 90
~ 85 -.:; > 80 ~
"Cl
75 C:
::,
0 "' 70
65 60
55 50
45 40
10:10 10:11
FIS takeoff from SLI
10:02 10:04
Time
OC Water Drop
10:12
Time
10:06
10:13
LAeq
Thres hold
10:08 10:10
LAeq
Thres hold
10:14

Noise Monitoring Technical Report A-8 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USAF FlS
120 ~--------------------------
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 111.0
ircraft Lmax : 100 .0
mbient Leq: 57.5
LAeq
Threshold
60 -ll-- 4+-4- - ~ Ar-1-- +-...... + +l-=lf.---~ .P::..:....~----lL- + ~ en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +-------------~---------------1
10:30 10:31
120
115 ircraft SEL: 97.5
110 ircraft Lmax: 84.8
105 mbient Leq: 57.9
100
95 90
85 80
75 70
65 60
55 50
45 40
10:36 10:38 10:40
10:32
Time
Sammy Mason
10:42
Time
10:44
10:33 10:34
LAeq
Threshold
10:46 10:48

Noise Monitoring Technical Report A-9 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Ace Maker x2
120
115 ircraft SEL: 90.1 LAeq
Thres hold
110 ircraft Lmax : 77.3
105 mbient Leq: 55.4
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
10:50 10:52 10:54 10:56 10:58
Time
Subsonex
120 ,---------------------------
115
110
ircraft SEL: 94.4
ircraft Lmax : 81.3
105 mbient Leq: 53.2
100
95 en 90
~ 85 -.:; >
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 LAeq
Thres hold
40 +-----'-~----~----~---~----~--I
11:02 11:04 11:06 11:08
Time
11:10 11:12

Noise Monitoring Technical Report A-10 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN Fl8 Rhino
120 ~------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 117.9
ircraft Lmax : 107 .9
mbient Leq: 52.1
LAeq
Threshold
55 1-;.lw-'-_,__~ 1;!--l,i---,+___;f,hJJ!l---~l--- +--+--'--VJll--~ ,!lf--'WI en
~
-.:; > .,
...J
"O
C: ::,
0 "'
50 45
40 +----~---~--~---~---~---~---1
11:14 11:16 11:18
120
115 ircraft SEL: 74.5
110 ircraft Lmax: 64.0
105 mbient Leq: 51.3
100
95 90
85 80
75 70
65 60
55 50
45 40
11:29 11:30 11:31
11:20
Time
11:22
CA ANG Cl30
11:32
Time
11:33
11:24 11:26
LAeq
Threshold
11:34 11:35

Noise Monitoring Technical Report A-11 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
en
~
.,
> .,
...J
~
C: ::,
0 "'
en
~
-.:; > .,
...J
~
C: ::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 ircraft SEL: 82.0
ircraft Lmax: 66.1
mbient Leq: 52.6
Lyon Air Museum C47
LAeq
Thre shold
40 +----~--~---~---~-------~-----1
11:35 11:36 11:37 11:38 11:39 11:40 11:41 11:42
Time
Snowbirds
120
115 ircraft SEL: 99.8 LAeq
Thres hold
110 ircraft Lmax: 87.8
105 mbient Leq: 53.1
100
95 90
85 80
75 70
65 60
55 50
45 40
11:45 11:50 11:55 12:00 12:05 12:10
Time

Noise Monitoring Technical Report A-12 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN F35C
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 119.9
ircraft Lmax : 108.3
mbient Leq: 5 .5
LAeq
Threshold
--~---- - ------,-- ------~----------- ---<
en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +---~---~--~---~---~--~---~---1
12:34 12:36 12:38
120
115 ircraft SEL: 102 .3
110 ircraft Lmax : 89.1
105 mbient Leq: 57.1
100
95 90
85 80
75 70
65 60
55 50
45 40
12:52 12:54
12:40 12:42
Time
12:44
Michael Goulian
12:56
Time
12:58
12:46 12:48
LAeq
Threshold
13:00 13:02

Noise Monitoring Technical Report A-13 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 105.3
110 ircraft Lmax : 98.9
105 mbient Leq: 55.2
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:03 13:04 13:05
FedEx B757
LAeq
Threshold
13:06 13:07 13:08 13:09 13: 10 13: 11
Time
USN Growler
120 ~------------------------~
115
110
105
100
95 en 90
~ 85 -.:; >
~ 80
~ 75 ::,
0 "' 70
ircraft SEL: 119.1
ircr aft Lmax : 107 .0
mbient Leq: 5.6
LAeq
Threshold
65 60 -+-- +-tt--H--++- t-----i --- - - - -+--+ - ~ t--- - - -l 55 50
45 40 -+-----~----~----~----~------!
13:10 13:12 13:14 13:16 13:18 13:20
Time

Noise Monitoring Technical Report A-14 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
en
~
.,
> .,
...J
"O
C: ::,
0 "'
en
~
-.:; > .,
...J
"O
C: ::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 40
120
115
ircraft SEL: 88.3
ircraft Lmax : 71.4
mbient Leq: 57.2
13:22 13:24
ircraft SEL: 109.9
Red Bull Helo
13:26 13:28
Time
USAF FlS
13:30
110 ircraft Lmax : 102 .1
105 mbient Leq: 57.1
100
95 90
85 80
75 70
65 60
55 50
45 40
13:34:00 13:34 :30 13:35 :00 13:35 :30 13:36:00
Time
LAeq
Threshold
13:32 13:34
LAeq
Threshold
13:36 :30 13:37:00

Noise Monitoring Technical Report A-15 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

en
~
.,
> .,
...J
-0
C: ::,
0 "'
en
~
-.:; > .,
...J
-0
C: ::,
0 "'
120
115 ircraft SEL: 84.4
110 ircraft Lmax: 73.6
105 mbient Leq: 57.3
100
95 90
85 80
75 70
65 60
55 50
45 40
13:41 :00 13:41:30
120
115 ircraft SEL: 124 .9
110 ircra Lmax: 112.5
105 mbi L : 56.5
100
95 90
85 80
75 70
65 60
55 50
45 USAF KC135
13:42 :00
Time
USAF Heritage
13:42:30
LAeq
Thres hold
13:43:00
LAeq
Thresho ld
40 +--~--r------r------r------r------r------r------r------r----l 15:25 15:30 15:35 15:40 15:45 15:50 15:55 16:00 16:05
Time

Noise Monitoring Technical Report A-16 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M3 - Hyatt Regency Hotel
FIS takeoff from SLI
120 -------------------------~
115
110
105
100
95 '° 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 101.2
ircraft Lmax: 89.8
mbient Leq: 56.9
LAeq
Threshold
60 -h'--ll,1-1,j:,.._ __ ...JjJ..!...._ -IU....,. -l----l ,l.,l-.. ~ -l-.;__:~ --+l~ :,.._+I-~ 55 50
45 40 -+-----------------~--------,
09:58 10:00 10:02 10:04
Time
10:06 10:08 10:10
OC Water Drop
120 -------------------------~
115
110
105
100
95 '° 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 87.1
ircraft Lmax: 74.3
mbient Leq: 55.5
LAeq
Threshold
--------~------------------
40 +---------------------------1
10:10 10:11 10:12
Time
10:13 10:14

Noise Monitoring Technical Report A-17 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Leap Frogs
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 91.4
ircraft Lmax : 77.8
mbient Leq: 55.0
LAeq
Thres hold
-~--------------~,_-->-..... >-+---~,._- --...... ---<
40 +---~--~---~--~--~---~--~-----1
10:22 10:23 10:24 10:25 10:26 10:27 10:28 10:29 10:30
Time
USAF FlS
120
115 ircraft SEL: 99.6 LAeq
Thresho ld
110 ircraft Lmax : 88.2
105 mbient Leq: 58.1
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
10:30 10:31 10:32 10:33 10:34
Time

Noise Monitoring Technical Report A-18 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Sammy Mason
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ire raft SEL: 100. 7
ircraft Lmax : 88.0
mbient Leq: 60.4
LAeq
Thres hold
40 +----~----~---~----~---~-----I
10:36 10:38 10:40
120
115 ircraft SEL: 94.5
110 ircraft Lmax: 85.9
105 mbient Leq: 57.3
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
10:50 10:52
10:42
Time
Ace Maker x2
10:54
Time
10:44
10:56
10:46 10:48
LAeq
Thres hold
10:58

Noise Monitoring Technical Report A-19 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Subsonex
120 ~------------------------~
115
110
ircraft SEL: 95.6
ircraft Lmax : 81.5
105 mbient Leq: 5 7 .1
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
LAeq
Threshold
65 60 ~ 4+--IA~~~-U-..l.!~L,11::W..---'U!.~~-U----=- -l-.U..Jl- ...:.:J,J.l..l 55 50
45 40 +---------------------------1
11:02 11:04 11:06 11:08
Time
USN Fl8 Rhino
11:10 11:12
120 ~--------------------------
115 ircraft SEL: 114 .9
110 ircraft Lmax: 107 .9
105 mbient eq: 60.3
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 LAeq
Threshold
40 +---------------------------1
11:14 11:16 11:18 11:20
Time
11:22 11:24 11:26

Noise Monitoring Technical Report A-20 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Snowbirds
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 104.6
ircraft Lmax : 98 .0
mbient Leq: 57.1
LAeq
Threshold
40 +-~---~----,-C.---~---~----~-----1
11:45 11:50 11:55 12:00
Time
USN F35C
12:05 12:10
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
ircraft SEL: 116 .1
ircraft Lmax: 107 .1
mbient Leq: 57.5
LAeq
Threshold
65 60 -++lr-+lt+-+ "-- ---1- - +t--½ft+- -ilHll-+- - - - --fllt++- - - --'-I 55 50
45 40 +---~---~--~---~---~--~---~---1
12:34 12:36 12:38 12:40 12:42
Time
12:44 12:46 12:48

Noise Monitoring Technical Report A-21 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Michael Goulian
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 102 .6
irc raft Lmax: 100.4
mbient Leq: 57.5
LAeq
Threshold
60 +-ff"'F- ....... l+--+--..;_ -+-- ....,..~ --'-ll-f++- -'-- -"'-- -l+-' '--tll--l - ---11 en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +-------~--------------~-----I
12:52 12:54
120
115 ircraft SEL: 97.7
110 ircraft Lmax: 91.0
105 mbient Leq: 57.6
100
95 90
85 80
75 70
65 60
55 50
45 40
13:03 13:04 13:05
12:56
Time
FedEx B 757
12:58 13:00 13:02
LAeq
Threshold
13:06 13:07 13:08 13:09 13: 10 13: 11
Time

Noise Monitoring Technical Report A-22 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN Growler
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 117.1
ircraft Lmax : 111 .0
mbient Leq: 59.6
LAeq
Threshold
40 +-----~----~-----~----~-------1
13:10 13:12 13:14 13:16 13:18 13:20
Time
Red Bull Helo
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 96.0
ircraft Lmax: 84 .1
mbient Leq: 58. 7
LAeq
Threshold
40 +--~---~---~---~---~---~-----I
13:22 13:24 13:26 13:28
Time
13:30 13:32 13:34

Noise Monitoring Technical Report A-23 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USAF FlS
120 ~--------------------------
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 104.8
ircraft Lmax : 98.1
mbient Leq: 57.7
LAeq
Thres hold
50 µ ::..,._ 4-__ ~ ,__-l,,,,"---...lL---=- --"--41"---'H>-- ',----~ en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +---------~---~----~----------1
13:34:00 13:34 :30 13:35 :00 13:35 :30 13:36:00 13:36 :30 13:37:00 Time
USAF KC135
120
115 ircraft SEL: 88.5 LAeq
Thresho ld
110 ire raft Lmax : 78. 7
105 mbient Leq: 58.1
100
95 90
85 80
75 70
65 60
55 50
45 40
13:41 :00 13:41 :30 13:42 :00 13:42 :30 13:43:00
Time

Noise Monitoring Technical Report A-24 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

120
115 ircraft SEL: 123.4
110 ircra Lmax : 111.0
105 mbi t Leq: 57.4
100
95 ;;:; 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
15:25 15:30 15:35
USAF F35A
LAeq
Thres hold
15:40 15:45 15:50 15:55 16:00 16:05
Time

Noise Monitoring Technical Report A-25 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M3
FIS takeoff from SLI
120 -------------------------~
115
110
105
100
95 '° 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 101.2
ircraft Lmax: 89.8
mbient Leq: 56.9
LAeq
Threshold
60 -h'--ll,1-1,j:,.._ __ ...JjJ..!...._ -IU....,. -l----l ,l.,l-.. ~ -l-.;__:~ --+l~ :,.._+I-~ 55 50
45 40 -+-----------------~--------,
09:58 10:00 10:02 10:04
Time
10:06 10:08 10:10
OC Water Drop
120 -------------------------~
115
110
105
100
95 '° 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 87.1
ircraft Lmax: 74.3
mbient Leq: 55.5
LAeq
Threshold
--------~------------------
40 +---------------------------1
10:10 10:11 10:12
Time
10:13 10:14

Noise Monitoring Technical Report A-26 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Leap Frogs
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 91.4
ircraft Lmax : 77.8
mbient Leq: 55.0
LAeq
Thres hold
-~--------------~,_-->-..... >-+---~,._- --...... ---<
40 +---~--~---~--~--~---~--~-----1
10:22 10:23 10:24 10:25 10:26 10:27 10:28 10:29 10:30
Time
USAF FlS
120
115 ircraft SEL: 99.6 LAeq
Thresho ld
110 ircraft Lmax : 88.2
105 mbient Leq: 58.1
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
10:30 10:31 10:32 10:33 10:34
Time

Noise Monitoring Technical Report A-27 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Sammy Mason
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ire raft SEL: 100. 7
ircraft Lmax : 88.0
mbient Leq: 60.4
LAeq
Thres hold
40 +----~----~---~----~---~-----I
10:36 10:38 10:40
120
115 ircraft SEL: 94.5
110 ircraft Lmax: 85.9
105 mbient Leq: 57.3
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
10:50 10:52
10:42
Time
Ace Maker x2
10:54
Time
10:44
10:56
10:46 10:48
LAeq
Thres hold
10:58

Noise Monitoring Technical Report A-28 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Subsonex
120 ~------------------------~
115
110
ircraft SEL: 95.6
ircraft Lmax : 81.5
105 mbient Leq: 5 7 .1
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
LAeq
Threshold
65 60 ~ 4+--IA~~~-U-..l.!~L,11::W..---'U!.~~-U----=- -l-.U..Jl- ...:.:J,J.l..l 55 50
45 40 +---------------------------1
11:02 11:04 11:06 11:08
Time
USN Fl8 Rhino
11:10 11:12
120 ~--------------------------
115 ircraft SEL: 114 .9
110 ircraft Lmax: 107 .9
105 mbient eq: 60.3
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 LAeq
Threshold
40 +---------------------------1
11:14 11:16 11:18 11:20
Time
11:22 11:24 11:26

Noise Monitoring Technical Report A-29 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Snowbirds
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 104.6
ircraft Lmax : 98 .0
mbient Leq: 57.1
LAeq
Threshold
40 +-~---~----,-C.---~---~----~-----1
11:45 11:50 11:55 12:00
Time
USN F35C
12:05 12:10
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
ircraft SEL: 116 .1
ircraft Lmax: 107 .1
mbient Leq: 57.5
LAeq
Threshold
65 60 -++lr-+lt+-+ "-- ---1- - +t--½ft+- -ilHll-+- - - - --fllt++- - - --'-I 55 50
45 40 +---~---~--~---~---~--~---~---1
12:34 12:36 12:38 12:40 12:42
Time
12:44 12:46 12:48

Noise Monitoring Technical Report A-30 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Michael Goulian
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 102 .6
irc raft Lmax: 100.4
mbient Leq: 57.5
LAeq
Threshold
60 +-ff"'F- ....... l+--+--..;_ -+-- ....,..~ --'-ll-f++- -'-- -"'-- -l+-' '--tll--l - ---11 en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +-------~--------------~-----I
12:52 12:54
120
115 ircraft SEL: 97.7
110 ircraft Lmax: 91.0
105 mbient Leq: 57.6
100
95 90
85 80
75 70
65 60
55 50
45 40
13:03 13:04 13:05
12:56
Time
FedEx B 757
12:58 13:00 13:02
LAeq
Threshold
13:06 13:07 13:08 13:09 13: 10 13: 11
Time

Noise Monitoring Technical Report A-31 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN Growler
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 117.1
ircraft Lmax : 111 .0
mbient Leq: 59.6
LAeq
Threshold
40 +-----~----~-----~----~-------1
13:10 13:12 13:14 13:16 13:18 13:20
Time
Red Bull Helo
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 96.0
ircraft Lmax: 84 .1
mbient Leq: 58. 7
LAeq
Threshold
40 +--~---~---~---~---~---~-----I
13:22 13:24 13:26 13:28
Time
13:30 13:32 13:34

Noise Monitoring Technical Report A-32 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USAF FlS
120 ~--------------------------
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 104.8
ircraft Lmax : 98.1
mbient Leq: 57.7
LAeq
Thres hold
50 µ ::..,._ 4-__ ~ ,__-l,,,,"---...lL---=- --"--41"---'H>-- ',----~ en
~
-.:; > .,
...J
"O
C: ::,
0 "'
55 50
45 40 +---------~---~----~----------1
13:34:00 13:34 :30 13:35 :00 13:35 :30 13:36:00 13:36 :30 13:37:00 Time
USAF KC135
120
115 ircraft SEL: 88.5 LAeq
Thresho ld
110 ire raft Lmax : 78. 7
105 mbient Leq: 58.1
100
95 90
85 80
75 70
65 60
55 50
45 40
13:41 :00 13:41 :30 13:42 :00 13:42 :30 13:43:00
Time

Noise Monitoring Technical Report A-33 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

120
115 ircraft SEL: 123.4
110 ircra Lmax : 111.0
105 mbi t Leq: 57.4
100
95 ;;:; 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
15:25 15:30 15:35
USAF F35A
LAeq
Thres hold
15:40 15:45 15:50 15:55 16:00 16:05
Time

Noise Monitoring Technical Report A-34 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M4 - Pecan Avenue and 8th Street
120
115
110
105
100
95 'in 90
~ 85 -.:; > 80 ~
-a 75 C:
::,
0 "' 70
65 60
55 50
45 40
ircraft SEL: 97.3
ircraft Lmax: 84 .9
mbient Leq: 52. 7
09:58 10 :00
FIS takeo ff from SLI
10 :02 10 :04
Time
USAF F15
10 :06
LAeq
Threshold
10 :08 10 :10
120 ~------------------------~
115
110
105
100
95 'in 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 104.3
ircraft Lma x: 96 .9
mbient Leq: 57.3
LAeq
Thresho ld
60 -+.+---.H- -+++----+-----,,-fll-r'-...... - --'--'l--+---++- ---- - --1 55 50
45 40 +------~-----~--- ---~--- ----1
10 :30 10 :31 10:32
Time
10 :33 10 :34

Noise Monitoring Technical Report A-35 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Sammy Mason
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ire raft SEL: 91. 7
ircraft Lmax : 75.8
mbient Leq: 51.5
LAeq
Threshold
55 -¾f-....L..-tf-11--+ -'-ttt----' 4tt-;f!l:.11Htfl:--t'r-t-+--,Hllr- --tfl-ll-, 50 45
40 +-------------~---------------1
10:36 10:38 10:40 10:42
Time
Ace Maker x2
10:44 10:46 10:48
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 89. 7
ire raft Lmax: 76. 7
mbient Leq: 51.6
LAeq
Threshold
55 -fl'"- ---ti-- ...... - - ..... - - --=--- --11.--,-,.---,t"Tl":'t-- -t:al~ ---t--t----tr-tt---:-I 50 45
40 +--~----------~----~----------1
10:50 10:52 10:54
Time
10:56 10:58

Noise Monitoring Technical Report A-36 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Subsonex
120
115 ircraft SEL: 86 .9 LAeq
Thresho ld
110 ircraft Lmax : 73.1
105 mbient Leq: 51.5
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C:
::,
0 "' 70
65 60
55 50
45 40
11:02 11:04 11:06 11:08 11:10 11:12
Time
USN Fl8 Rhino
120
115 111 - LAeq 1,
- Thresho ld
110 io, .. _, ___ _ ., ,_,., ~~J,7
105 16,mbient Leq: 52.8
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C:
::,
0 "' 70
~
65 60 II ,I
55 ti ~ ij/ 50 ~
45 40
11:14 11:16 11:18 11:20 11:22 11:24 11:26
Time

Noise Monitoring Technical Report A-37 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
en
~
.,
> .,
...J
~
C:
::,
0 "'
en
~
-.:; > .,
...J
~
C:
::,
0 "'
120
115 ircraft SEL: 93.2
110 ircraft Lmax : 81.3
105 mbient Leq: 50.9
100
95 90
85 80
75 70
65 60
55 50
45 40
11:45 11:50
120
115 ircraft SEL: 12 ,7
110 ircraft Lmax: 16.6
105 mbient Leq: 5 ,8
100
95 90
85 80
75 70
65 60
55 50
45 Snowbirds
11:55 12:00
Time
USN F35C
12:05
LAeq
Thres hold
12:10
LAeq
Thresho ld
40 +---~---~--~---~---~--~---~---1
12:34 12:36 12:38 12:40 12:42
Time
12:44 12:46 12:48

Noise Monitoring Technical Report A-38 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 95.9
110 ircraft Lmax: 81.6
105 mbient Leq: 51.9
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
12:52 12:54
120
115 ircraft SEL: 99.4
110 ircraft Lmax: 92.4
105 mbient Leq: 51.8
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:03 13:04 13:05
Michael Goulian
12:56
Time
FedEx B757
12:58
LAeq
Threshold
13:00 13:02
LAeq
Threshold
13:06 13:07 13:08 13:09 13: 10 13: 11
Time

Noise Monitoring Technical Report A-39 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN Growler
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 115.2
ircraft Lmax : 106 .8
mbient Leq: 52.2
LAeq
Threshold
55 -t-"1Ht-""Hlt-"-- ~ 'tt-~ l'ht-- ""1ttll:J---V-'-ft-f - --+1tt---~ 50 45
40 +-----~----~-----~----~-------1
13 :10 13:12 13 :14 13:16 13 :18 13 :20
Time
USAF FlS
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 102.4
ircraft Lmax: 94.1
mbient Leq: 53.3
LAeq
Threshold
55 -f-r-lrl-'I-Nw---....... -1---~¥-' t--- -f-''l-:--f-"""t-+- -\r-- N~ 50 45
40 +----~-----r-----~----,-----~------1
13 :34:00 13 :34 :30 13:35:00 13 :35 :30 13 :36:00 13:36 :30 13 :37:00 Time

Noise Monitoring Technical Report A-40 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

USAF KC135
120
115 ircraft SEL: 83.5 LAeq
Thres hold
110 ircraft Lmax: 79.9
105 mbient Leq: 53.1
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:41 :00 13:41:30 13:42 :00 13:42 :30 13:43:00
Time
120
USAF Heritage
115 11\ircraft SEL: 124.4
110 11\ircraft Lm x: 119.3
105 16,mbient Le : 51.4
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 ~ 50
LAeq
45 Thresho ld
40 r
15:25 15:30 15:35 15:40 15:45 15:50 15:55 16:00 16:05
Time

Noise Monitoring Technical Report A-41 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M7 – Huntington Beach City Hall
'in
~
-.:; >
~
-a
C:
::,
0 "'
'in
~
-.:; >
~
-a
C:
::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 Thunderbirds diamond pract ice
ircraft SEL: 108.6
ire raft Lmax: 99. 7
mbient Leq: 51.5
LAeq
Thres hold
40 +-,--- .,-'--'- ~--~~-+-~~--~---,---~-~ - -.-<
09:30 09:35 09:40 09:45 09 :50 09:55 10:00 10:05 10:10 10:15 10:20 Time
120
Sammy Mason
115 ircraft SEL: 90.2 LAeq
Thresho ld
110 ircraft Lmax: 78 .0
105 mbient Leq: 52.3
100
95 90
85 80
75 70
65 60
55 50
45 40
10:32 10:33 10:34 10:35 10:36 10:37 10:38 10:39 10:40 10:4 1 Time

Noise Monitoring Technical Report A-42 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
en
~
.,
> .,
...J
~
C: ::,
0 "'
en
~
-.:; > .,
...J
~
C: ::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 ircraft SEL: 84.8
ircraft Lmax : 71.4
mbient Leq: 52.8
Ace Maker
LAeq
Threshold
40 +----~--~---~---~--------r-------1
10:42 10:44 10:46
120
115 ircraft SEL: 90. 7
110 ire raft Lmax : 78. 7
105 mbient Leq: 51. 7
100
95 90
85 80
75 70
65 60
55 50
45 10:48 10:50
Time
Subsonex
10:52 10:54 10:56
LAeq
Threshold
40 +----r-----r-----r-----r-----r----~--~--~----1
10:58 10:59 11:00 11:01 11:02 11:03 11:04 11:05 11:06 11:07 Time

Noise Monitoring Technical Report A-43 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 106.2
110 ircraft Lmax : 95.5
105 mbient Leq: 51.1
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
11:10
120
115 ircraft SEL: 102 .0
110 ircraft Lmax: 88.5
105 mbient Leq: 52.4
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
11:55 12:00
11:15
12:05
USN Growler
11:20
Time
Snowbirds
11:25
LAeq
Thresho ld
11:30
LAeq
Thres hold
12:10 12:15 12:20 12:25 12:30
Time

Noise Monitoring Technical Report A-44 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 118 .2
110 ircraft Lmax : 12.8
105 mbient Leq: .4
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
12:46 12:48 12:50
USN F35C
12:52
Time
12:54
Matt and Emma
12:56
LAeq
Threshold
12:58 13:00
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; >
~ 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 82.8
ircraft Lma x: 68 .6
mbient Leq: 51.8
LAeq
Threshold
55 -Ml'-+,Hff--+--f+-h- - --flfi-++--:H'.-.Hr- .,_-lllllffllHl~Kr- -t--+-1 50 45
40 +-----~---~----~----~----~----1
13:00 13:02 13:04 13:06
Time
13:08 13:10

Noise Monitoring Technical Report A-45 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 79.6
110 ircraft Lmax : 67 .8
105 mbient Leq: 49.3
100
95 en 90
~ 85 .,
> 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:12 13:13 13:14
120
115 ircraft SEL: 78 .6
110 ircraft Lmax: 65.8
105 mbient Leq: 50. 7
100
95 en 90
~ 85 -.:; > 80 .,
...J
~
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:21 13:22 13:23
FedEx B757
13:15 13:16 13:17
Time
Army Helos
13:24 13:25
Time
LAeq
Thre shold
13:18 13:19
LAeq
Thres hold
13:26 13:27

Noise Monitoring Technical Report A-46 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USN Grow ler
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 107.8
ircraft Lmax : 94 .3
mbient Leq: 50. 7
LAeq
Thres hold
55 i.- -+-""-'1-H4-++-- -+-- +-+-"- - -+-- ---,l-fif+t +-- - - -+-'-I,-,!,---, en
~
-.:; > .,
...J
"O
C: ::,
0 "'
50 45
40 +--~---~----~---~----~---~----,
13:48 13:50 13:52 13:54 13:56 13:58
Time
USAF KC135
120
115 ircraft SEL: 75.3 LAeq
Thresho ld
110 ircraft Lmax : 61.6
105 mbient Leq: 47.8
100
95 90
85 80
75 70
65 60
55 50
45 40
14:12 14:13 14:14 14:15 14:16 14:17 14:18
Time

Noise Monitoring Technical Report A-47 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 120.2
110 ircraft Lm x : 111.2
105 mbi nt Le : 51.4
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
14:20 14:25 14:30
USAF Heritage
LAeq
- Threshold
14:35 14:40 14:45 14:50 14:55 15:00
Time
Michael Goulian
120 ~------------------------~
115
110
105
100
95 en 90
~ 85 -.:; >
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 84.8
ircraft Lmax: 68.4
mbient Leq: 50.6
LAeq
Threshold
40 +--~----~---~----~---~------!
15:12 15:14 15:16
Time
15:18 15:20 15:22

Noise Monitoring Technical Report A-48 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

Jet Waco
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 85.0
ircraft Lmax : 71 .0
mbient Leq: 51.4
LAeq
Threshold
55 1t11'--l+-----l -tft+olrtf11Hltt' t-tHIIIHr+in 'l1'-~Mll tt...._------:-tf''--lt-++-t 50 45
40 +-----~----~-----~----~-------1
15:24 15:26 15:28 15:30 15:32 15:34
Time
Thunderbirds
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 108 .2
ircraft Lma x: 94 .9
mbient Leq: 51.2
LAeq
Thresho ld
55 r-T1rdrt-t-tt't'l'-tt1H --,.~Hn-11H
50 45
40 +--~--~--~----r-----r-----r---~--~-----1
15:40 15:45 15:50 15:55 16:00 16:05 16:10 16:15 16:20
Time

Noise Monitoring Technical Report A-49 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Site M9 – Peterson Elementary School
3 Thunderbirds diamond practice
120 ------------------------ ~ ~
115
110
105
100
95 'in 90
~ 85 -.:;
~ 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 124.0
ircraft Lmax : 119.9
mbient Leq: 50.9
LAeq
Thres hold
40 -,-~~--~ ~ -~-~~~~---+---+---~--~--rl
'in
:s
-.:; >
.5
'O
C:
::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 09:40 09:45 09:50 09:55 10:00 10:05 10:10 10:15 10:20 Time
Leap Frogs Flag Jump w USA Anthem
ircraft SEL: 85.4
ircraft Lmax : 71.7
mbient Leq : 58.l
LAeq
Thres hold
40 +------~--- --~- ------------,
10:30 :00 10:30 :30 10:31 :00
Time
10:31:30 10:32 :00

Noise Monitoring Technical Report A-50 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Sammy Mason
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 87.6
ircraft Lmax: 76.4
mbient Leq: 51.3
LAeq
Threshold
55 ¼ -ft- ,U,Hijln'l:t-ft-+if- ----'IJ-f-¥'- -fflltl----t lHiH t+-W--+-,1+-:11---tJH, 50 45
40 +---~--~--~--~--~--~--~--~----1
10 :32 10 :33 10 :34 10 :35 10 :36 10:37 10:38 10:39 10:40 10 :41 Time
Ace Maker
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 93.1
ire raft Lmax: 83. 7
mbient Leq: 50.8
LAeq
Threshold
55 t-:th1tt---\'1Httt--fl1t;-;- - --t-ti"Hr.-r ---t--tt;111t----tH1>"1tllllr---tllHttt- ----'fl 50 45
40 +----~--~---~---~---~---~-----1
10 :42 10 :44 10 :46 10:48 10:50 10:52 10:54 10 :56
Time

Noise Monitoring Technical Report A-51 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Subsonex
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
55 50
45 ircraft SEL: 98.0
ircraft Lmax: 86 .8
mbient Leq: 49.6
LAeq
Thre shold
40 +---~--~--~--~--~--~--~--~----1
10:58 10:59 11:00 11:01 11:02 11:03 11:04 11:05 11:06 11:07 Time
USN Growler
120
115 ircraft SEL: 112 .9 LAeq
Thres hold
110 ircraft Lmax: 107 .8
105 mbient L e : 49.0
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
11:10 11:15 11:20 11:25 11:30
Time

Noise Monitoring Technical Report A-52 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 109.6
110 ircraft Lmax : 98.8
105 mbient Leq: 51.2
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C:
::,
0 "' 70
65 60
55 50
45 40
11:55 12:00
120
115 ircraft SEL: 105. 7
110 ircraft Lmax : 94.0
105 mbient Leq: 49.9
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C:
::,
0 "' 70
65 60
55 50
45 40
12:46 12:48
12:05
12:50
Snowbirds
LAeq
Threshold
12:10 12:15 12:20 12:25 12:30
Time
USN F35C
12:52
Time
12:54 12:56
LAeq
Threshold
12:58 13:00

Noise Monitoring Technical Report A-53 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
en
~
.,
> .,
...J
~
C:
::,
0 "'
en
~
-.:; > .,
...J
~
C:
::,
0 "'
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 ircraft SEL: 87.9
ircraft Lmax : 78 .0
mbient Leq: 48.4
Matt and Emma
LAeq
Thre shold
40 +-----~---~----~----~----~----1
13:00 13:02 13:04
120
115 ircraft SEL: 76 .1
110 ircraft Lmax: 66.5
105 mbient Leq: 51.5
100
95 90
85 80
75 70
65 60
55 50
45 40
13:21 13:22 13:23
13:06
Time
Army Helos
13:24
Time
13:08
13:25
13:10
LAeq
Thresho ld
13:26 13:27

Noise Monitoring Technical Report A-54 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 88.0
110 ircraft Lmax: 74.4
105 mbient Leq: 49.8
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:34 13:36
120
115 ircraft SEL: 113.4
110 ircraft Lmax: 103 .0
105 mbient Leq: 51.1
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
13:48 13:50
Army Golden Knights
13:38
Time
13:40
USN Growler
13:52 13:54
Time
LAeq
Threshold
13:42 13:44
13:56
LAeq
Threshold
13:58

Noise Monitoring Technical Report A-55 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
120
115 ircraft SEL: 86.1
110 ircraft Lmax : 76 .5
105 mbient Leq: 50.2
100
95 en 90
~ 85 .,
> 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
14:00 14:0 1 14:02
120
115 ircraft SEL: 88.4
110 ircraft Lmax : 81.0
105 mbient Leq: 50.0
100
95 en 90
~ 85 -.:; > 80 .,
...J
"O
75 C: ::,
0 "' 70
65 60
55 50
45 40
14:12 14:13 14:14
Red Bull Helo
14:03 14:04 14:05
Time
USAF KC135
14:15 14:16
Time
LAeq
Thres hold
14:06 14:07
LAeq
Thresho ld
14:17 14:18

Noise Monitoring Technical Report A-56 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
USAF Heritage
120 ~--------------------------
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ircraft SEL: 120.1
ircraft Lmax : 110.2
mbient Le • 51.

LAeq
Threshold
55 -HH ------;__ --=-!IIHl,_.....i~ ll-------'- -+- -ffl-~ 50 45
40 +-------------- ---'---------------1
14:20 14:25 14:30 14:35 14:40 14:45 14:50 14:55 15:00
Time
Michael Goulian
120 ~--------------------------
115
110
105
100
95 en 90
~ 85 -.:; > _3 80
~ 75 ::,
0 "' 70
65 ircraft SEL: 94.1
ircraft Lmax: 84 .2
mbient Leq: 54.4
LAeq
Threshold
60 tf-.....!.J,1---....1....+ - -+--lll--+-t-l-HH l½rlflllHIIFl--llfM-:lff- -l~~ 55 50
45 40 +-------~---------------------1
15:12 15:14 15:16
Time
15:18 15:20 15:22

Noise Monitoring Technical Report A-57 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023

Jet Waco
120 ~-------------------------~
115
110
105
100
95 en 90
~ 85 .,
> _3 80
~ 75 ::,
0 "' 70
65 60
ire raft SEL: 95. 7
ircraft Lmax : 85.8
mbient Leq: 53.3
LAeq
Threshold
55 J----,-tHl.tt.Lff lt----lw-t-ft--Mitt--tif--11111-HF---tlt-fL---lf._tt----fl hPI-H en
~
-.:; > .,
...J
""O
C:
::,
0 "'
50 45
40 +-----~----~-----~----~-------1
15:24 15:26 15:28 15:30 15:32 15:34
120
115
110
105
100
95 90
85 80
75 70
65 60
55 50
45 40
ircraft SEL: 128 .5
ircraft Lmax: 125 .1
mbient Leq: 50.4
Time
Thunderbirds
LAeq
Threshold
15:40 15:45 15:50 15:55 16:00 16:05 16:10 16:15 16:20
Time

Noise Monitoring Technical Report B-1 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Appendix B – Calibration Certificates

Calibration Certificate
Cerlificate Number 2023001643
Customer:

The Modal Shop
10310 AeroHub Boulevard
Cincinnati, OH 45215, United States
Model Number 831
Serial Number 0003221
Test Results Pass
Initial Condition AS RECEIVED same as shipped
Description Larson Davis Model 831
Class 1 Sound Level Meter
Firmware Revision: 2.403
Procedure Number
Technician
Calibration Date
Calibration Due
Temperature
Humidity
Static Pressure
D0001.8378
Jacob Cannon
8 Feb 2023

23.88 ·c ± 0.25 ·c
49 %RH ± 2.0 %RH

86.85 kPa ± 0.13 kPa
Evaluation Method Tested electrically using Larson Davis PRM831 S/N 029590 and a 12.0 pF capacitor to simulate microphone capacitance. Data reported in dB re 20 µPa assuming a microphone sensitivity of 50.0 mV/Pa.

Compliance Standards Compliant to Manufacturer Specifications and the following standards when combined with Calibration Certificate from procedure D0001.8384:

IEC 60651 :2001 Type 1
IEC 60804:2000 Type 1
IEC 61252:2002
IEC 61672:2013 Class 1
IEC 61260:2001 Class 1
ANSI S1.4-2014 Class 1
ANSI S1 .4 (R2006) Type 1
ANSI S1 .25 (R2007)
ANSI S1.43 (R2007) Type 1
ANSI S1 .11 (R2009) Class 1
Issuing lab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure (unless otherwise noted). It has been calibrated using measurement standards traceable to the International System of Units (SI) through the National Institute of Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of ISO/IEC 17025:2017. Test points marked with a :t In the uncertainties column do not fall within this laboratory's scope of accreditation.

The quality system is registered to ISO 9001 :2015.

This calibration is a direct comparison of the unit under test to the listed reference standards and did not involve any sampling plans to complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by the customer as needed.

The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM). A coverage factor of approximately 2 sigma (k=2) has been applied to the standard uncertainty to express the expanded uncertainty at approximately 95% confidence level.

This report may not be reproduced, except in full, unless permission for the publication of an approved abstract is obtained in writing from the organization issuing this report.

Correction data from Larson Davis Model 831 Sound Level Meter Manual, 1831.01 Rev S, 2019-09-10 Calibration Check Frequency: 1000 Hz; Reference Sound Pressure Level: 114 dB re 20 µPa; Reference Range: O dB gain

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
•LARSON DAVIS

A PCB DIVISION
2023-2-8Tl4:44:49 Page 1 of 10 D0001.8407 Rev G
Description
Hart Scientific 2626-H Temperature Probe
SRS DS360 Ultra Low Distortion Generator

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-000 I
2023-2-8Tl4:44:49
Certificate Number 2023001643
Standards Used
Cal Date
2021-08-25
2022-09-02
Cal Due
2023-02-25
2023-09-02

of 10
Cal Standard
006798
007167
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

1.0 0.8

0.6 0.4
iii' 0.2
:!:?.

Cerlificate Number 2023001643
Z-weight Filter Response
I
I

6.0 4.0 -------------
= 0
'.C

0.0 2.0 ~
3 s· 1--------.... --------+-------1-----...... -... --.... -----------l 0.0 e!. --0.2
"' -~ -0.4 ..
~ -0.6
-0.8
-1.0
10 -Nominal
100 1000
Frequency [Hz]
■ Deviation -Lower Lim it -Upper Lim it
10000
.­
-2.0 ~
~
-4.0 a:
~
-6.0
100000
Electrical signal test of frequency weighting performed according to IEC 61672-3:2013 13 and ANSI S1 .4-2014 Part 3: 13 for compliance to IEC 61672-1 :2013 5.5; IEC 60651 :2001 6.1 and 9.2.2; IEC 60804:2000 5; ANSI S1 .4:1983 (R2006) 5.1 and 8.2.1; ANSI S1 .4-2014 Part 1: 5.5 I Expanded Frequency (Hz) Test Result [dB) Deviation [dB] Lower limit [dB] Upper limit [dB) U 1 [dB) Result ncerta nty

6.31 63.10
125.89
251.19
501.19
1,000.00
1,995.26
3,981.07
7,943.28
15,848.93
19,952.62

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-8Tl4:44:49
-0.36
-0.05
-0.04
-0.06
-0.03

0.00 -0.03
-0.01

0.04 -0.06
-0.33
-0.36
-0.05
-0.03
-0.05
-0.02

0.00 -0.03
-0.01

0.04 -0.06
-0.33
-0.63
-0.30
-0.30
-0.30
-0.30
-0.30
-0.30
-0.30
-0.30
-0.42
-0.71
--End of measurement results--

0.12 0.30

0.30 0.30

0.30 0.30

0.30 0.30

0.30 0.32

0.41 0.15

0.15 0.15

0.15 0.15

0.15 0.15

0.15 0.15

0.15 0
.15
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023001643
A-weighted 0 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 I
.I
J
-=-I
-
~I-

0.8 t .-L

0.6 0.4
iii' 0.2 ·.'I~ ~ ..... • ... 0.0 ■ ■ ■ ■ ■ ■ ■ ■ ■ I ■ 0 -~
I ... -0.2 ... I w
-0.4
l --- ---
-0.6
-0.8
·1.0

10.0 30.0 50.0 70.0 90.0 110.0 130.0 150.0
Level Injected [dB]
■ Error -Lo1•.er Lirrit -Upper Llrril
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1.4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1 .4 (R2006) 6.9, ANSI S1 .4-2014 Part 1: 5.6, ANSI S1 .43 (R2007) 6.2 Level [dB] Error [dB] Lower limit [dB] Upper limit [dB) Expanded Result Uncertainty [dB)

26.00 0.29 -0.70 0.70 0.16 Pass

27.00 0.19 -0.70 0.70 0.16 Pass

28.00 0.26 -0.70 0.70 0.16 Pass

29.00 0.18 -0.70 0.70 0.16 Pass

30.00 0.23 -0.70 0.70 0.16 Pass

31.00 0.14 -0.70 0.70 0.16 Pass

32.00 0.12 -0.70 0.70 0.16 Pass

33.00 0.16 -0.70 0.70 0.16 Pass

34.00 0.17 -0.70 0.70 0.16 Pass

35.00 0.08 -0.70 0.70 0.16 Pass

36.00 0.07 -0.70 0.70 0.16 Pass

39.00 0.04 -0.70 0.70 0.16 Pass

44.00 0.02 -0.70 0.70 0.16 Pass

49.00 0.03 -0.70 0.70 0.16 Pass

54.00 0.03 -0.70 0.70 0.16 Pass

59.00 0.03 -0.70 0.70 0.16 Pass

64.00 0.02 -0.70 0.70 0.16 Pass

69.00 0.03 -0.70 0.70 0.16 Pass

74.00 0.00 -0.70 0.70 0.16 Pass

79.00 0.03 -0.70 0.70 0.16 Pass

84.00 0.02 -0.70 0.70 0.16 Pass

89.00 0.02 -0.70 0.70 0.16 Pass

94.00 0.02 -0.70 0.70 0.16 Pass

99.00 0.02 -0.70 0.70 0.16 Pass
104.00 0.00 -0.70 0.70 0.15 Pass
109.00 0.02 -0.70 0.70 0.15 Pass
114.00 0.00 -0.70 0.70 0.15 Pass
119.00 0.03 -0.70 0.70 0.15 Pass
124.00 0.02 -0.70 0.70 0.15 Pass
129.00 0.02 -0.70 0.70 0.15 Pass
134.00 0.01 -0.70 0.70 0.15 Pass
135.00 0.01 -0.70 0.70 0.15 Pass
136.00 0.02 -0.70 0.70 0.15 Pass
137.00 0.01 -0.70 0.70 0.15 Pass
138.00 0.01 -0.70 0.70 0.15 Pass
139.00 0.01 -0.70 0.70 0.15 Pass

LARSON DAVIS -A PCB DIVISION
.~,~~✓-~--ft 1681 West 820 North
•LARSON DAVIS ™
Provo, UT 84601, United States
716-684-000 I "-;,_;~~/ @i!!OITffi A PCB DIVISION ,,1,,/,1f_.\1~•' CEIU 13621.01 2023-2-8TJ4:44:49 Page 4 of 10 D0001.8407 Rev G
Level [dB]
140.00

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 l, United States
716-684-000 I
2023-2-8Tl4:44:49
Certificate Number 2023001643
Error [dB)

0.00 Lower limit [dB) Upper limit [dB)
-0.70 0.70
--End of measuremeut results--

Expanded
Uncertainty (dB

0.15 Result
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023001643
A-weighted 20 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 I
l
l 0.8
j 0.6 -

0.4 --
:J-- al 0.2 .... :!:!. •••••
··--• •
■ ■ ■ ■
• ... 0.0 • • • • e -0.2 I I ...

I I w
-0.4
-=-1 -0.6
-0.8
-1.0

10.0 30.0 50.0 70.0 90.0 110.0 130.0
Level Injected [dB]
■ Error -Lo11er Llrrit -Upper Lirril
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1.4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S 1.4 {R2006) 6.9, ANSI S1 .4-2014 Part 1: 5.6 ANSI S1 .43 {R2007) 6.2 Level (dB] Error [dB) Lower limit (dB) Upper limit (dB] Expanded Result Uncertaincy (dB)

21.00 0.25 -0.70 0.70 0.16 Pass

22.00 0.21 -0.70 0.70 0.16 Pass

23.00 0.18 -0.70 0.70 0.16 Pass

24.00 0.16 -0.70 0.70 0.16 Pass

25.00 0.14 -0.70 0.70 0.16 Pass

26.00 0.10 -0.70 0.70 0.16 Pass

27.00 0.08 -0.70 0.70 0.16 Pass

28.00 0.07 -0.70 0.70 0.16 Pass

29.00 0.07 -0.70 0.70 0.16 Pass

30.00 0.06 -0.70 0.70 0.16 Pass

31.00 0.05 -0.70 0.70 0.16 Pass

32.00 0.04 -0.70 0.70 0.16 Pass

33.00 0.06 -0.70 0.70 0.16 Pass

34.00 0.06 -0.70 0.70 0.16 Pass

35.00 0.04 -0.70 0.70 0.16 Pass

36.00 0.03 -0.70 0.70 0.16 Pass

37.00 0.03 -0.70 0.70 0.16 Pass

38.00 0.03 -0.70 0.70 0.16 Pass

39.00 0.04 -0.70 0.70 0.16 Pass

44.00 0.03 -0.70 0.70 0.16 Pass

49.00 0.03 -0.70 0.70 0.16 Pass

54.00 0.03 -0.70 0.70 0.16 Pass

59.00 0.03 -0.70 0.70 0.16 Pass

64.00 0.02 -0.70 0.70 0.16 Pass

69.00 0.03 -0.70 0.70 0.16 Pass

74.00 0.01 -0.70 0.70 0.16 Pass

79.00 0.04 -0.70 0.70 0.16 Pass

84.00 0.03 -0.70 0.70 0.16 Pass

89.00 0.04 -0.70 0.70 0.16 Pass

94.00 0.04 -0.70 0.70 0.16 Pass

99.00 0.04 -0.70 0.70 0.16 Pass
104.00 0.02 -0.70 0.70 0.15 Pass
109.00 0.02 -0.70 0.70 0.15 Pass
114.00 0.00 -0.70 0.70 0.15 Pass
115.00 0.03 -0.70 0.70 0.15 Pass
116.00 0.01 -0.70 0.70 0.15 Pass
LARSON DAVIS - A PCB DIVISION ,,,,1111,,,
1681 West 820 North .... ~, .... ~'/,~,, n •LARSON DAVIS ~ Provo, UT 84601, United States -~-'-,;)~Q ,f (ic«EDIT'iii'J A PCB DIVISION 716-684-000 I 114,/,.h, ,~,, CERT 13622.01 2023-2-8T14:44:49 Page 6 of 10 D0001.8407 Rev G
Certificate Number 2023001643
Level (dB)
117.00
118.00
119.00
120.00
Error (dB] Lower limit (dB) Upper limit (dB) Expanded
Uncertainty (dB)

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass

0.01 -0.70

0.01 -0.70

0.03 -0.70

0.02 -0.70
--End of measurement results--
Peak Rise Time
Peak rise time performed according to IEC 60651 :2001 9.4.4 and ANSI S1 .4:1983 (R2006) 8.4.4 Amplitude (dB] Duration [µs]
139.00 40
30 Negative Pulse
Positive Pulse
Negative Pulse
Positive Pulse
Test Result (dB] Lower limit [dB)
136.00 134.52
136.00 134.52
135.06 134.52
135.08 134.52
•· End of measurement results--

0.70 0.70

0.70 0.70
Upper limit [dB)
136.52
136.52
136.52
136.52
Expanded
Uncertainty (dB]

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Positive Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651 :2001 9.4.2 and ANSI S1 .4:1983 (R2006) 8.4.2 Amplitude [dB] Crest Factor
138.00
128.00
118.00
108.00

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-8Tl4:44:49
3 5
10 3
5 10
3 5
10 3
5 10
Test Result [dB) Limits (dB]
OVLD ± 0.50
OVLD ± 1.00
OVLD ± 1.50
-0.12 ± 0.50
-0.10 ± 1.00
OVLD ± 1.50
-0.12 ± 0.50
-0.12 ± 1.00
-0.24 ± 1.50
-0.12 ± 0.50
-0.11 ± 1.00
-0.16 ± 1.50
•· End of measurement results--

Expanded Uncertainty (dB) Result

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.16 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.18 :j: Pass

0.15 :j: Pass

0.15 :j: Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
I
Certificate Number 2023001643
Negative Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651 :2001 9.4.2 and ANSI S1 .4:1983 (R2006) 8.4.2 Amplitude [dB) Crest Factor Test Result [dB] Limits [dB) Expanded Uncertainty [dB) 138.00 3 OVLD ± 0.50
5 OVLD ± 1.00
10 OVLD ± 1.50
128.00 3 -0.12 ± 0.50
5 -0.10 ± 1.00
10 OVLD ± 1.50
118.00 3 -0.12 ± 0.50
5 -0.10 ± 1.00
10 -0.24 ± 1.50
108.00 3 -0.12 ± 0.50
5 -0.10 ± 1.00
10 -0.16 ± 1.50
--End of measurement results--
Gain
Gain measured according to IEC 61672-3:2013 17.3 and 17.4 and ANSI S1 .4-2014 Part 3: 17.3 and 17.4 Measurement Test Result [dB) Lower limit [dB) Upper limit [dBi 0 dB Gain 94.00 93.89 94.09
0 dB Gain, Linearity 29.19 28.29 29.69
20 dB Gain 94.00 93.89 94.09
20 dB Gain, Linearity 24.12 23.29 24.69
OBA Low Range 93.99 93.89 94.09
OBA Normal Range 93.99 93.20 94.80
--End of measurement results--
Broadband Noise Floor
Self-Aenerated noise measured accordinA to IEC 61672-3:2013 11.2 and ANSI S1.4-2014 Part 3: 11.2 Measurement
A-weight Noise Floor
C-weight Noise Floor
Z-weight Noise Floor
Measured using 1/3-0ctave filters
Measurement
10 Hz Signal
THO
THD+N
Test Result (dB)

7.14 12.14

21.78 Upper limit (dB]

15.00 17.30

24.50 --End of measurement results--
Total Harmonic Distortion
Test Result (dB)
137.53
-73.64
-66.30
Lower Limit [dBi
137.20
Upper Limit [dB)
138.80
-60.00
-60.00
--End of measurement results--

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

Expanded
Uncertainty [dB)

0.15 0.16

0.15 0.16

0.15 0.15
Expanded
Uncertainty [dB)

0.15 0.01 :j:

0.01 :j:

Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Result
Pass
Pass
Pass
Pass
Pass
Pass Result
Pass
Pass
Pass
Result
Pass
Pass
Pass

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
•LARSON DAVIS

A PCB DIVISION
2023-2-8Tl4:44:49 Page 8 of 10 D0001.8407 Rev G
16 iii' 12
:!:!.
ai 8
> Q)
..J 4 ,,
f 0 :::,
VI CV
Q)
:!: -4
-8

1.0 10.0
The SLM is set to low range and 20 dB gain.

Frequency [Hz]

6.30 8.00

10.00 12.50

16.00 20.00

25.00 31.50

40.00 50.00

63.00 80.00
100.00
125.00
160.00
200.00
250.00
315.00
400.00
500.00
630.00
800.00
1,000.00
1,250.00
1,600.00
2,000.00
2,500.00
3,150.00
4,000.00
5,000.00
6,300.00
8,000.00
10,000
.00
12,500.00
16,000.00
20,000.00

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-8T14:44:49
Certificate Number 2023001643
1/3-0ctave Self-Generated Noise
I_
100.0 1000.0
Frequency [Hz]
■ Measured ---Upper Unit
Te.,t Result [dB) Upper limit [dB)

10.81 15.50

9.66 14.70

8.69 13.90

7.67 13.10

6.52 12.30

6.20 11.50

5.28 10.70

3.96 9.90

2.72 9.10

1.67 8.10

1.08 7.10

0.17 6.10
-1.02 5.30
-1.59 4.70
-2.49 4.10
-2.91 3.60
-4.10 3.10
-4.44 2.70
-4.81 2.60
-5.46 2.60
-5.96 2.70
-6.29 2.80
-6.53 3.00
-6.57 3.20
-6.52 3.50
-6.36 3.80
-5.89 4.30
-5.27 4.90
-4.48 5.70
-3.96 6.40
-3.72 7.40
-3.40 8.60
-2.89 9.80
-2.14 11.20
-1.21 12.60
-0.04 14.00
--End of measurement results--

10000.0 100000.0
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pa
ss
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

LARSON DAVIS -A PCB DNISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-8Tl4:44:49
Certificate Number 2023001643
--End of Report--
Signatory: Ja<,bl, ~
•LARSON DAVIS

A PCB DIVISION

Calibration Certificate
Certificate Number 2023001628
Customer:

The Modal Shop
10310 AeroHub Boulevard
Cincinnati, OH 45215, United States
Model Number 831
Serial Number 0003558
Test Results Pass
Initial Condition AS RECEIVED same as shipped
Description Larson Davis Model 831
Class 1 Sound Level Meter
Firmware Revision: 2.403
Procedure Number
Technician
Cal/brat/on Date
Calibration Due
Temperature
Humidity
Static Pressure
D0001.8378
Jacob Cannon
8 Feb 2023

23.77 ·c ± 0.25 ·c

49.1 %RH ± 2.0 %RH

86.92 kPa ± 0.13 kPa
Evaluation Method Tested electrically using Larson Davis PRM831 S/N 029590 and a 12.0 pF capacitor to simulate microphone capacitance. Data reported in dB re 20 µPa assuming a microphone sensitivity of 50.0 mV/Pa.

Compliance Standards Compliant to Manufacturer Specifications and the following standards when combined with Calibration Certificate from procedure D0001.8384:

IEC 60651 :2001 Type 1
IEC 60804:2000 Type 1
IEC 61252:2002
IEC 61672:2013 Class 1
IEC 61260:2001 Class 1
ANSI S1 .4-2014 Class 1
ANSI S1 .4 (R2006) Type 1
ANSI S1 .25 (R2007)
ANSI S1 .43 (R2007) Type 1
ANSI S1.11 (R2009) Class 1
Issuing lab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure (unless otherwise noted). It has been calibrated using measurement standards traceable to the International System of Units (SI) through the National Institute of Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of ISO/IEC 17025:2017. Test points marked with a :t In the uncertainties column do not fall within this laboratory's scope of accreditation.

The quality system is registered to ISO 9001:2015.

This calibration is a direct comparison of the unit under test to the listed reference standards and did not involve any sampling plans to complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by the customer as needed.

The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM). A coverage factor of approximately 2 sigma (k=2) has been applied to the standard uncertainty to express the expanded uncertainty at approximately 95% confidence level.

This report may not be reproduced, except in full, unless permission for the publication of an approved abstract is obtained in writing from the organization issuing this report.

Correction data from Larson Davis Model 831 Sound Level Meter Manual, 1831.01 Rev S, 2019-09-10 Calibration Check Frequency: 1000 Hz; Reference Sound Pressure Level: 114 dB re 20 µPa; Reference Range: O dB gain

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
•LARSON DAVIS

A PCB DIVISION
2023-2-STI 3: 19: 19 Page 1 of 10 D0001.8407 Rev G
Description
Hart Scientific 2626-H Temperature Probe
SRS DS360 Ultra Low Distortion Generator

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
2023-2-8Tl3: 19: 19
Certificate Number 2023001628
Standards Used
Cal Date
2021-08-25
2022-09-02
Cal Due
2023-02-25
2023-09-02

Cal Standard
006798
007167
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

1.0 0.8

0.6 0.4
in 0.2
:!:!.

Certificate Number 2023001628
Z-weight Filter Response

6.0 4.0

2.0 ~
3 = 0.0
0 1--------..--------•--------•-------_...,. _______ ----i o.o s· !!. ·.: -0.2 "' '>' -0.4 .. i::i -0.6
-0.8
-1.0
10 -Nominal
100 1000
Frequency [Hz]
■ Deviation -Lower Limit -Upper Limit
10000
r­
-2.0 ~
~
-4.oc:
~
100000
Electrical signal test of frequency weighting performed according to IEC 61672-3:2013 13 and ANSI S1 .4-2014 Part 3: 13 for compliance to IEC 61672-1 :2013 5.5; IEC 60651 :2001 6.1 and 9.2.2; IEC 60804:2000 5; ANSI S1 .4:1983 (R2006) 5.1 and 8.2.1; ANSI S1 .4-2014 Part 1: 5.5 Frequency [Hz] Test Result [dB]

6.31 63.10
125.89
251.19
501.19
1,000.00
1,995.26
3,981.07
7,943.28
15,848.93
19,952.62

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-8Tl3: 19: 19
-0.48
-0.06
-0.03
-0.04
-0.02

0.00 -0.03
-0.01

0.04 -0.06
-0.34
Deviation [dB] Lower limit [dB] Upper limit [dB) Expanded Result Uncertainty (dB) -0.48 -0.63 0.12 0.15 Pass
-0.06 -0.30 0.30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.04 -0.30 0.30 0.15 Pass
-0.02 -0.30 0.30 0.15 Pass

0.00 -0.30 0.30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.01 -0.30 0.30 0.15 Pass

0.04 -0.30 0.30 0.15 Pass
-0.06 -0.42 0.32 0.15 Pass
-0.34 -0.71 0.41 0.15 Pass
--End of measurement results--
•LARSON DAVIS

A PCB DIVISION

Certificate Number 2023001628
A-weighted 0 dB Gain Broadband Log Linearity: 8,000.00 Hz ai'
;2.
...
~ ... w
I 1----'-=ylillllll _________ --1■1':-----■-----■----■I:---i■----·---· --1■,I:----■-----■--1:---i■----·----· --l■L:-------1 ~ I
-0.4
-0.6
-0.8
-1.0 ,__ ____ ........ _____ _,__ _____ _.__ ____ ___. _____ _._ _____ .......... ____ __.

10.0 30.0 50.0 70.0 90.0 110.0 130.0 150.0
Level Injected [dB]
■ Error -Loy.er Llrrit -Upper Lirrit
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1.4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1.4 {R2006) 6.9, ANSI S1 .4-2014 Part 1: 5.6, ANSI S1 .43 (R2007) 6.2 Level [dB) Error [dB) Lower limit [dB] Upper limit [dB) Expanded Result Uncertainty [dB]

26.00 0.25 -0.70 0.70 0.16 Pass

27.00 0.20 -0.70 0.70 0.16 Pass

28.00 0.17 -0.70 0.70 0.16 Pass

29.00 0.09 -0.70 0.70 0.16 Pass

30.00 0.07 -0.70 0.70 0.16 Pass

31.00 0.06 -0.70 0.70 0.16 Pass

32.00 0.01 -0.70 0.70 0.16 Pass

33.00 0.03 -0.70 0.70 0.16 Pass

34.00 0.03 -0.70 0.70 0.16 Pass

35.00 0.01 -0.70 0.70 0.16 Pass

36.00 -0.01 -0.70 0.70 0.16 Pass

39.00 0.03 -0.70 0.70 0.16 Pass

44.00 0.01 -0.70 0.70 0.16 Pass

49.00 0.02 -0.70 0.70 0.16 Pass

54.00 0.02 -0.70 0.70 0.16 Pass

59.00 0.02 -0.70 0.70 0.16 Pass

64.00 0.01 -0.70 0.70 0.16 Pass

69.00 0.02 -0.70 0.70 0.16 Pass

74.00 0.00 -0.70 0.70 0.16 Pass

79.00 0.03 -0.70 0.70 0.16 Pass

84.00 0.02 -0.70 0.70 0.16 Pass

89.00 0.02 -0.70 0.70 0.16 Pass

94.00 0.02 -0.70 0.70 0.16 Pass

99.00 0.02 -0.70 0.70 0.16 Pass
104.00 -0.01 -0.70 0.70 0.15 Pass
109.00 0.02 -0.70 0.70 0.15 Pass
114.00 0.00 -0.70 0.70 0.15 Pass
119.00 0.03 -0.70 0.70 0.15 Pass
124.00 0.02 -0.70 0.70 0.15 Pass
129.00 0.02 -0.70 0.70 0.15 Pass
134.00 0.02 -0.70 0.70 0.15 Pass
135.00 0.01 -0.70 0.70 0.15 Pass
136.00 0.02 -0.70 0.70 0.15 Pass
137.00 0.01 -0.70 0.70 0.15 Pass
138.00 0.01 -0.70 0.70 0.15 Pass
139.00 0.02 -0.70 0.70 0.15 Pass

LARSON DAVIS - A PCB DIVISION
~\\"I"/'~
1681 West 820 North --~-~-~--~
•LARSON DAVIS ~ Provo, UT 84601, United States
<.:,~/ (AcqeDITffi 716-684-0001 ''1,,t,,111\,~'' CERT 1362'2.0I A PCB DIVISION 2023-2-8Tl3: 19: 19 Page 4 of 10 D0001.8407 Rev G
r
Level [dB)
140.00

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
2023-2-8TI 3: 19:19
Certificate Number 2023001628
Error [dB)

0.01 Lower limit [dB) Upper limit (dB)
-0.70 0.70
--End of measurement results--

Expanded
Uncertainty [dB)

0.15 Result
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023001628
A-weighted 20 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 0.8

0.6 0.4
iii' 0.2 ..
~ •••••• ... 0.0
0 ... -0.2 ... w
• • ■ .1 ■ ■ ■ ■
-0.4 ---~--+--------
-0.6
-0.8
-1.0

10.0 30.0 50.0 70.0 90.0 110.0 130.0
Level Injected [dB]
■ Error -Lov.er Unit -Upper Unit
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1 .4-2014 Part 3: 16 for compliance to IEC 61672-1 :2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1.4 {R2006) 6.9, ANSI S1.4-2014 Part 1: 5.6, ANSI S1.43 (R2007) 6.2 Level [dB] Error [dB] Lower limit [dB] Upper limit (dB) Expanded Result Uncertainty [dB)

21.00 0.25 -0.70 0.70 0.16 Pass

22.00 0.20 -0.70 0.70 0.16 Pass

23.00 0.15 -0.70 0.70 0.16 Pass

24.00 0.13 -0.70 0.70 0.16 Pass

25.00 0.12 -0.70 0.70 0.16 Pass

26.00 0.08 -0.70 0.70 0.16 Pass

27.00 0.09 -0.70 0.70 0.16 Pass

28.00 0.06 -0.70 0.70 0.16 Pass

29.00 0.05 -0.70 0.70 0.16 Pass

30.00 0.05 -0.70 0.70 0.16 Pass

31.00 0.04 -0.70 0.70 0.16 Pass

32.00 0.03 -0.70 0.70 0.16 Pass

33.00 0.05 -0.70 0.70 0.16 Pass

34.00 0.05 -0.70 0.70 0.16 Pass

35.00 0.03 -0.70 0.70 0.16 Pass

36.00 0.02 -0.70 0.70 0.16 Pass

37.00 0.01 -0.70 0.70 0.16 Pass

38.00 0.01 -0.70 0.70 0.16 Pass

39.00 0.04 -0.70 0.70 0.16 Pass

44.00 0.02 -0.70 0.70 0.16 Pass

49.00 0.02 -0.70 0.70 0.16 Pass

54.00 0.02 -0.70 0.70 0.16 Pass

59.00 0.02 -0.70 0.70 0.16 Pass

64.00 0.01 -0.70 0.70 0.16 Pass

69.00 0.02 -0.70 0.70 0.16 Pass

74.00 -0.01 -0.70 0.70 0.16 Pass

79.00 0.03 -0.70 0.70 0.16 Pass

84.00 0.01 -0.70 0.70 0.16 Pass

89.00 0.04 -0.70 0.70 0.16 Pass

94.00 0.04 -0.70 0.70 0.16 Pass

99.00 0.04 -0.70 0.70 0.16 Pass
104.00 0.01 -0.70 0.70 0.15 Pass
109.00 0.02 -0.70 0.70 0.15 Pass
114.00 0.00 -0.70 0.70 0.15 Pass
115.00 0.03 -0.70 0.70 0.15 Pass
116.00 0.01 -0.70 0.70 0.15 Pass
LARSON DAVIS -A PCB DIVISION ,,,11111,,,
1681 West 820 North ,:,•:/''.. . .::::::! .. /'~,, D •LARSON DAVIS ~ Provo, UT 84601, United States \~f IACCREDIT]ID 716-684-000 I '1111111111\•~'' CERT 13621.01 A PCB DIVISION 2023-2-STIJ: 19: 19 Page 6 of 10 D0001.8407 Rev G
Certificate Number 2023001628
Level (dB)
117.00
118.00
119.
00 120.00
Error (dB) Lower limit [dB) Upper limit [dB) Expanded
Uncertainty (dB)

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass

0.01 -0.70

0.02 -0.70

0.03 -0.70

0.02 -0.70
--End of measurement results--
Peak Rise Time
Peak rise time performed according to IEC 60651 :2001 9.4.4 and ANSI S1 .4:1983 {R2006) 8.4.4 Amplitude [dB) Duration [µs) Test Result (dB] Lower limit (dB] 139.00 40 Negative Pulse 136.00 134.52
Positive Pulse 136.00 134.52
30 Negative Pulse 135.07 134.52
Positive Pulse 135.07 134.52
--End of measurement results--

0.70 0.70

0.70 0.70
Upper limit [dB]
136.52
136.52
136.52
136.52
Expanded
Uncertainty [dB]

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Positive Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651 :2001 9.4.2 and ANSI S 1.4:1983 (R2006) 8.4.2 Amplitude (dB] Crest Factor
138.00
128.00
118.00
108.00

LARSON DAVIS - A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-2-ST 13: 19: 19
3 5
10 3
5 10
3 5
10 3
5 10
Test Result (dB] Limits (dB]
OVLD ± 0.50
OVLD ± 1.00
OVLD ± 1.50
-0.12 ± 0.50
-0.11 ± 1.00
OVLD ± 1.50
-0.12 ± 0.50
-0.11 ± 1.00
-0.16 ± 1.50
-0.12 ± 0.50
-0.11 ± 1.00
-0.25 ± 1.50
--End of measurement results--

Expanded Uncertainty [dB] Result

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.16 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.18 :j: Pass

0.15 :j: Pass

0.15 :j: Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023001628
Negative Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651 :2001 9.4.2 and ANSI S1 .4:1983 (R2006) 8.4.2 Amplitude (dB] Crest Factor Test Result (dB] Limits (dB] Expanded Uncertalnty (dB] 138.00 3 OVLD ± 0.50
5 OVLD ± 1.00
10 OVLD ± 1.50
128.00 3 -0.11 ± 0.50
5 -0.10 ± 1.00
10 OVLD ± 1.50
118.00 3 -0.13 ± 0.50
5 -0.10 ± 1.00
10 -0.16 ± 1.50
108.00 3 -0.11 ± 0.50
5 -0.12 ± 1.00
10 -0.25 ± 1.50
--End of measurement results--
Gain
Gain measured according to IEC 61672-3:2013 17.3 and 17.4 and ANSI S1.4-2014 Part 3: 17.3 and 17.4 Measurement Test Result (dB] Lower limit [dB] Upper limit [dB] 0 dB Gain 93.99 93.89 94.09
0 dB Gain, Linearity 29.14 28.29 29.69
20 dB Gain 94.00 93.89 94.09
20 dB Gain, Linearity 24.09 23.29 24.69
OBA Low Range 93.99 93.89 94.09
OBA Normal Range 93.99 93.20 94.80
--End of measurement results--
Broadband Noise Floor
SelH1enerated noise measured accordinQ to IEC 61672-3:2013 11.2 and ANSI S1.4-2014 Part 3: 11.2 Measurement
A-weight Noise Floor
C-weight Noise Floor
2-weight Noise Floor
Measured using 1/3-0ctave filters
Measurement
10 Hz Signal
THO
THD+N
Test Result [dB)

7.24 12.22

21.91 Upper limit [dB)

15.00 17.30

24.50 --End of measurement results--
Total Harmonic Distortion
Test Result [dB]
137.53
-74.12
-66.57
Lower Limit [dB]
137.20
Upper Limit (dB)
138.80
-60.00
-60.00
--End of measurement results--

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 +

0.15 +

0.15 +

0.15 +

0.15 +

0.15 :j:

Expanded
Uncertainty (dB]

0.15 0.16

0.15 0.16

0.15 0.15
Expanded
Uncertainty LdB]

0.15 0.01 +

0.01 +
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass Result
Pass
Pass
Pass
Pass
Pass
Pass Result
Pass
Pass
Pass
Result
Pass
Pass
Pass

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
•LARSON DAVIS

A PCB DIVISION
2023-2-8Tl3: 19: 19 Page 8 of 10 D0001.8407 Rev G
..
16 iii' 12
:!:!.
j 8
Q)
...J 4
"C
f :::, 0
1/)
('Q
Q) -4 ::il:
-8

1.0 10.0
The SLM Is set to low range and 20 dB gain.

Frequency [Hz)

6.30 8.00

10.00 12.50

16.00 20.00

25.00 31.50

40.00 50.00

63.00 80.00
100.00
125.00
160.00
200.00
250.00
315.00
400.00
500.00
630.00
800.
00 1,000.00
1,250.00
1,600.00
2,000.00
2,500.00
3,150.00
4,000.00
5,000.00
6,300.00
8,000.00
10,000.00
12,500.00
16,000.00
20,000.00

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
2023-2-8Tl3: 19: 19
Certificate Number 2023001628
1/3-0ctave Self-Generated Noise
100.0 1000.0
Frequency (Hz]
■ Measured ~ Upper Unit
Test Result [dB) Upper limit [dB]

10.45 15.50

10.38 14.70

8.98 13.90

7.56 13.10

7.00 12.30

5.98 11.50

4.52 10.70

4.16 9.90

2.74 9.10

1.88 8.10

1.32 7.10

0.29 6.10
-0.76 5.30
-1.69 4.70
-2.44 4.10
-2.98 3.60
-3.97 3.10
-4.49 2.70
-4.91 2.60
-5.59 2.60
-6.12 2.70
-6.37 2.80
-6.51 3.00
-6.64 3.20
-6.58 3.50
-6.39 3.80
-5.91 4.30
-5.33 4.90
-4.54 5.70
-4.08 6.40
-3.84 7.40
-3.58 8.60
-3.07 9.80
-2.36 11.20
-1.54 12.60
-0.59 14.00
--End of measurement results--

10000.0 100000.0
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
716-684-000 I
2023-2-STI 3: 19: 19
Certificate Number 2023001628
--End of Report--
Signatory: ./tUdt/, ~

•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Manufacturer: Customer: TMS Rental
Model Number: Address:

Serial Number: 313622
Asset ID: Cal Date / Cal ID:

Description: Due Date:

Sensitivity: 251.29 Hz 1000 Hz Temperature: 75 (24) °F (°C) -26.07 -26.11 dB re. 1V/Pa Humidity: 25 %

49.72 49.49 mV/Pa 1001 mbar
Reference Sens: In Tolerance
Freq. Response: In Tolerance Polarization Voltage: 0 VDC Traceability: The calibration is traceable through NIST Project A3214.

Notes: Calibration results relate only to the items calibrated.

This certificate may not be reproduced, except in full, without written permission.

This calibration is performed in compliance with ISO 9001, ISO 17025 and ANSI Z540.

Measurement uncertainty (250 Hz sensitivity calibration) at 95% confidence level: 0.30 dB Calibrated per procedure PRD-P204.

User Note: As Found / As Left : In Tolerance
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
20 0.45 630 0.03 4500 0.18
25 0.33 800 0.07 5000 0.20

31.5 0.19 1000 0.08 5600 0.18
40 0.27 1120 0.09 6300 0.16
50 0.13 1250 0.09 7100 0.08
63 0.13 1400 0.10 8000 0.02
80 0.07 1600 0.12 9000 -0.17
100 0.07 1800 0.11 10000 -0.22
125 0.08 2000 0.13 11200 -0.49
160 0.03 2240 0.13 12500 -0.11
200 0.04 2500 0.15 14000 -0.10
250 0.02 2800 0.16 16000 0.51
315 0.02 3150 0.18 18000 -0.22
400 0.02 3550 0.17 20000 -0.74
500 0.04 4000 0.18
Technician: Michael Wardlow Reference Equipment Used:

Manuf. Model Serial Cal. Date Due Date
Approval: GRAS 40AG 58093 2/28/2023 2/28/2024

Ambient Pressure:

Calibration Lab
CALIBRATION CERT 2649.01
Frequency Response with reference to level at 251.29 Hz ~Certificate of Calibration~
Mar 21, 2023 17:10:38
Free-Field Microphone
377B02
PCB
71156
-15
-10
-5
0 5
10 100 1000 10000
dB
Frequency [Hz]
Frequency Response Characteristics : The upper curve is the free field characteristic for the microphone with protection grid. The lower curve is the pressure response recorded by electrostatic actuator.

Sensitivity : The stated sensitivity is the open-circuit sensitivity. When used with a typical preamplifier the sensitivity will be 0.2 dB lower. ffTHE MODALSHOP

AN AMPHENOL COMPANY

I I I I

I I I I
7 I I 7
' I I I

I I I I I I
7 I I I 7
~
(Acciii:DITED)
I I
I I
I I I
I I '
I
10310 Aemhub Boullevard
Cincinnati , OHi 45215
Ph: 513.351.9919
Fax: 513 .458 .2172
www.moda lshop.com
I I I
I
I ,~
' ' I -I I
" " ~
... ..
.......
'"
" "
Manufacturer: Customer: TMS Rental
Model Number: Address:

Serial Number: 333454
Asset ID: Cal Date / Cal ID:

Description: Due Date:

Sensitivity: 251.29 Hz 1000 Hz Temperature: 74 (23) °F (°C) -27.25 -27.27 dB re. 1V/Pa Humidity: 35 %

43.38 43.31 mV/Pa 994 mbar
Reference Sens: In Tolerance
Freq. Response: In Tolerance Polarization Voltage: 0 VDC Traceability: The calibration is traceable through NIST Project A2212.

Notes: Calibration results relate only to the items calibrated.

This certificate may not be reproduced, except in full, without written permission.

This calibration is performed in compliance with ISO 9001, ISO 17025 and ANSI Z540.

Measurement uncertainty (250 Hz sensitivity calibration) at 95% confidence level: 0.30 dB Calibrated per procedure PRD-P204.

User Note: As Found / As Left : In Tolerance
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
20 0.08 630 0.04 4500 0.55
25 0.18 800 0.08 5000 0.64

31.5 0.08 1000 0.10 5600 0.67
40 0.06 1120 0.11 6300 0.72
50 0.02 1250 0.12 7100 0.73
63 0.04 1400 0.14 8000 0.70
80 0.04 1600 0.15 9000 0.64
100 0.03 1800 0.17 10000 0.36
125 0.05 2000 0.20 11200 0.11
160 0.03 2240 0.23 12500 0.43
200 0.02 2500 0.28 14000 0.50
250 0.02 2800 0.33 16000 1.22
315 0.02 3150 0.38 18000 0.92
400 0.02 3550 0.42 20000 0.54
500 0.04 4000 0.49
Technician: Michael Wardlow Reference Equipment Used:

Manuf. Model Serial Cal. Date Due Date
Approval: GRAS 40AG 9542 6/16/2022 6/16/2023

~Certificate of Calibration~
Jan 18, 2023 13:37:53
Free-Field Microphone
377B02
PCB
84914
Ambient Pressure:

Calibration Lab
CALIBRATION CERT 2649.01
Frequency Response with reference to level at 251.29 Hz -15
-10
-5
0 5
10 100 1000 10000
dB
Frequency [Hz]
Frequency Response Characteristics : The upper curve is the free field characteristic for the microphone with protection grid. The lower curve is the pressure response recorded by electrostatic actuator.

Sensitivity : The stated sensitivity is the open-circuit sensitivity. When used with a typical preamplifier the sensitivity will be 0.2 dB lower. ffTHE MODALSHOP

AN AMPHENOL COMPANY
~
(Acciii:DITED)
10310 Aemhub Boullevard
Cinc innati, OHi 452 15
Ph : 513.351.99 19
Fax: 513 .458.2172
www.moda lsho p.co m
~
" '
....
'-
' '
Calibration Certificate
Certificate Number 2023004875
Customer:

The Modal Shop
10310 AcroHub Boulevard
Cincinnati,OH 45215,United States
Model Number 831
Serial Number 0002270
Test Results Pass
/nit/a/ Condition AS RECEIVED same as shipped
Description Larson Davis Model 831
Class 1 Sound Level Meter
Firmware Revision: 2.403
Procedure Number
Technician
Calibration Date
Cal/brat/on Due
Temperature
Humidity
Static Pressure
D0001.8378
Jacob Cannon
20Apr2023

23.55 ·c ± 0.25 ·c

49.5 %RH ±2.0¾RH

86.74 kPa ±0.13 kPa
Evaluation Method Tested electrically using Larson Davis PRM831 SIN 077393 and a 12.0 pF capacitor to simulate microphone capacitance. Data reported in dB re 20 µPa assuming a microphone sensitivity of 50.0 mVIPa.

Compliance Standards Compliant to Manufacturer Specifications and the following standards when combined with Calibration Certificate from procedure D0001.8384:
!EC 60651 :2001 Type 1
IEC 60804:2000 Type 1
IEC 61252:2002
IEC 61672:2013 Class 1
IEC 61260:2001 Class 1
ANSI S1 .4-2014 Class 1
ANSI S1 .4 (R2006) Type 1
ANSI S1 .25 (R2007)
ANSI S1 .43 (R2007) Type 1
ANSI S1 .11 (R2009) Class 1
Issuing lab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure (unless otherwise noted). It has been calibrated using measurement standards traceable to the International System of Units (SI) through the National Institute of Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of ISO/IEC 17025:2017. Test points marked with a* in the uncertainties column do not fall within this laboratory's scope of accreditation.

The quality system is registered to ISO 9001:2015.

This calibration is a direct comparison of the unlt under test to the listed reference standards and did not involve any sampling plans to complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by the customer as needed.

The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM}. A coverage factor of approximately 2 sigma (k•2) has been applied to the standard uncertainty to express the expanded uncertainty at approximately 95% confidence level.

This report may not be reproduced, except in full, unless permission for the publication of an approved abstract is obtained in writing from the organization issuing this report.

Correction data from Larson Davis Model 831 Sound Level Meter Manual, 1831.01 Rev S, 2019-09-10 Calibration Check Frequency: 1000 Hz; Reference Sound Pressure Level: 114 dB re 20 µPa; Reference Range: O dB gain

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo,UT 84601,United States
716-684-000 I
ft. •LARSON DAVIS
2023-4-2 IT09:47:07
cACCREDITEQ;
CERT #~2'01

A PCB DIVISION
D0001.8407 Rev G
Description
Hart Scientific 2626MS Humidityffemperature Sensor
SRS DS360 Ultra Low Distortion Generator

LARSON DAVIS -A PCB DIVISION
168! West 820 North
Provo,UT 8460!,United States
716-684-000 I
2023•4-21 T09:47:07
Certificate Number 2023004875
Standards Used
Cal Date
2023-02-20
2023-03-31
Cal Due
2024-08-20
2024-03-31

of!O
Cal Standard
006946
007174
•LARSON DAVIS

A PCIJ DIVISION
D0001.8407 Rev G
Certificate Number 2023004875
Z-weight Filter Response

1.0 6.0

0.8 0.6

0.4 iii' 0.2
:!:?. ··••••••
= 0.0
0 -0.2
-- - - - - - Ill
:1 -0.4
~ -0.6
II )_ ... ----·· i--·-, ~-··
-0.8
-1.0
10 100 1000
Frequency [Hz]
-Nominal II Deviation Lower Limit
10000
Upper limit
·6 0
100000
Electrical signal test of frequency weighting performed according to IEC 61672-3:2013 13 and ANSI S1 .4-2014 Part 3: 13 for compliance to IEC 61672-1:2013 5.5; IEC 60651:2001 6.1 and 9.2.2; !EC 60804:2000 5; ANSI S1.4:1983 (R2006) 5.1 and 8.2.1; ANSI S1.4-2014 Part.1: 5.5 Frequency [Hz] Test Result [dB]

6.31 63.10
125.89
251.19
501.19
1,000.00
1,995.26
3,981.07
7,943.28
15,848.93
19,952.62

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
7 I 6-684-000 I
2023-4-2 IT09:47:07
-0.41
-0.03
-0.03
-0.05
-0.03

0.00 -0.02

0.00 0.04
-0.06
-0.35
Deviation (dB] Lower limit [dB] Upper limit [dB] Expanded Result Uncertainty (dB] -0.41 -0.63 0.12 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.05 -0.30 0.30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass

0.00 -0.30 0.30 0.15 Pass
-0.02 -0.30 0.30 0.15 Pass

0.00 -0.30 0.30 0.15 Pass

0.04 -0.30 0.30 0.15 Pass
-0.06 -0.42 0.32 0.15 Pass
-0.35 -0.71 0.41 0.15 Pass
-- End of measurement results--
•LARSON DAVIS

A PCB DIVISION

Certificate Number 2023004875
A-weighted 0 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 0.8

0.6 0.4
iii' 0.2
:2.
~ 0.0
e -0.2 ~
w
-0.4
-0.6
-0.8
-1.0
:i--1
······----T
I
I ~
!
!
I !
I
1•.... - -1 -1 i - - - I
• • • I I
I
., - - -
I
I I !
I
!
i
!
!
I
i -"--' t,,,,,. I -·--··y I I
I i I I

10.0 30.0 50.0 70.0 90.0 110.0 130.0
Level Injected [dB]
Broadband level linearity performed according to IEC 61672-312013 16 and ANSI S1 .4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1.4 (R2006) 6.9, ANSI S1.4-2014 Part 1: 5.6, ANSI S1.43 (R2007) 6.2 Level [dB] Error [dB] Lower limit [dB] Upper limit [dB] Expanded Uncertainty [dB]

26.00 0.38 -0.70 0.70 0.16 27.00 0.32 -0.70 0.70 0.16 28.00 0.31 -0.70 0.70 0.16

29.00 0.23 -0.70 0.70 0.16

30.00 0.23 -0.70 0.70 0.16 31.00 0.15 -0.70 0.70 0.16 32.00 0.06 -0.70 0.70 0.16 33.00 0.12 -0.70 0.70 0.16 34.00 0.07 -0.70 0.70 0.16 35.00 0.05 -0.70 0.70 0.16 36.00 0.02 -0.70 0.70 0.16

39.00 0.02 -0.70 0.70 0.16

44.00 0.01 -0.70 0.70 0.16

49.00 0.02 -0.70 0.70 0.16 54.00 0.02 -0.70 0.70 0.16 59.00 0.03 -0.70 0.70 0.16 64.00 0.01 -0.70 0.70 0.16 69.00 0.02 -0.70 0.70 0.16

74.00 0.02 -0.70 0.70 0.16

79.00 0.02 -0.70 0.70 0.16

84.00 0.02 -0.70 0.70 0.16 89.00 0.02 -0.70 0.70 0.16 94.00 0.02 -0.70 0.70 0.16 99.00 0.02 -0.70 0.70 0.16 104.00 0.00 -0.70 0.70 0.15 109.00 0.00 -0.70 0.70 0.15
114.00 0.00 -0.70 0.70 0.15
119.00 0.00 -0.70 0.70 0.15
124.00 0.00 -0.70 0.70 0.15 129.00 0.01 -0.70 0.70 0.15 134.00 0.00 -0.70 0.70 0.15 135.00 0.00 -0.70 0.70 0.15
136.00 0.00 -0.70 0.70 0.15 137.00 0.00 -0.70 0.70 0.15 138.00 0.00 -0.70 0.70 0.15 139.00 0.00 -0.70 0.70 0.15

LARSON DAVIS -A PCB DIVISION
150.0
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
,,~'\0'"5·,, 168I West 820 No1th
llii~~ •LARSON DAVIS Provo,UT 84601,United States
\~,?~ [~£,~~!Q1.!:[q; 716-684-000 I 'fr,1,.f.,\1<' Cf~I #36?201 A PCB DIVISION 2023-4-2 IT09:47:07 Page 4 of 10 D0001.8407 Rev G
Level (dB]
140.00

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo,UT 84601,Unitcd States
716-684-000 I
2023-4-2 IT09:47:07
Certificate Number 2023004875
Error (dB]
-0.01
Lower limit [dB] Upper limit [dB]
-0.70 0.70
-- End of measurement results--

Expanded
Uncertainly (dB]

0.15 Result
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

1.0 0.8

0.6 0.4
iii' 02
l:!.
~ 0.0
0 ~
-0.2 ~
w
-0.4
-0.6
-0.8
-1.0

10.0 Certificate Number 2023004875
A-weighted 20 dB Gain Broadband Log Linearity: 8,000.00 Hz I,
,~"--~,)"''"'.

I
i
I
i
I
I i I
,,~,m-.,~,-·~I! ... ,--~•-•~-•---•-•---•-•-•--.. , •·-f-- !

30.0 50.0 70.0 90.0 110,0
Level Injected [dB]
Broadband level linearity performed according to IEC 61672-3:201316 and ANSI S1 .4-2014 Part 3: 16 for compliance to IEC 61672-1:2013 5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1 .4 (R2006) 6.9, ANSI S1.4-2014 Part 1: 5.6, ANSI S1.43 (R2007) 6.2 Level (dB]

21.00 22.00

23.00 24.00

25.00 26.00

27.00 28.00

29.00 30.00

31.00 32.00

33.00 34.00

35.00 36.00

37.00 38.00

39.00 44.00

49.00 54.00

59.00 64.00

69.00 74.00

79.00 84.00

89.00 94.00

99.00 104.00
109.00
114.00
115.00
116.00
Error [dB]

0.22 0.19

0.16 0.14

0.12 0.09

0.07 0.06

0.04 0.03

0.04 0.03

0.05 0.05

0.04 0.03

0.01 O.Q1

0.01 0.02

0.02 0.02

0.03 0.01

0.02 0.02

0.01 0.01

0.02 0.01

0.02 0.00

0.00 0.00

0.00 -0.02
Lower limit {dB]
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
Upper limit [dB]

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70
Expanded
Uncertainty {dB]

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.15

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
130.0

LARSON DAVIS-A PCB DIVISION
1681 West 820 N011h
Provo,Ul' 84601,United States
,,..::''{~;.-,,
~~
'•,;;~;'' ~-.. •LARSON DAVIS
7 I 6-684-000 I ,ACRREDI_Tl:!pj
,,,,,,,,1«11<-'' CERT #3622.01 A PCB DIVISION
2023-4-21109:47:07 Page 6 of JO D0001.8407 Rev G
Certificate Number 2023004875
Level [dB)
117.00
118.00
119.00
120.00
Error [dBi Lower limit [dB) Upper limit [dB) Expanded
Uncertointy [dB)

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass

0.00 -0.70

0.00 -0.70

0.00 -0.70
-0.01 -0.70
-- End of measurement results--
Peak Rise Time
Peak rise time performed according to IEC 60651 :2001 9.4.4 and ANSI S1 .4:1983 (R2006) 8.4.4 Amplitude [dB) Duration lµs)
139.00 40
30 Negative Pulse
Positive Pulse
Negative Pulse
Positive Pulse
Test Result [dB] Lower limit (dB]
135.97 134.52
135.99 134.52
134,90 134.52
135.05 134.52
-- End of measurement results--

0.70 0.70

0.70 0.70
Upper limit [dB)
136.52
136.52
136,52
136.52
Expanded
Uncertainty [dB]

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Positive Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651:2001 9.4.2 and ANSI S1 .4:1983 (R2006) 8.4.2 Amplitude [dB] Crest Factor
138.00
128.00
118.00
108.00
LARSON DAVIS -A PCB DIVIS[ON
1681 West 820 North
Provo,UT 84601,United States
716-684-000 I
2023-4-21 T09:47:07
3 5
10 3
5 10
3 5
10 3
5 10
Test Result (dB] Limits )dB)
OVLD ±0.50
OVLD ± 1.00
OVLD ± 1.50
-0.12 ±0.50
-0.10 ± 1.00
OVLD ± 1.50
-0.12 ±0.50
-0.11 ± 1.00
-0.16 ± 1.50
-0.14 ±0.50
-0.12 ± 1.00

0.01 ± 1.50
-- End of measurement results--

Expanded Uncertainty (dB] Result

0.15:j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.16 :j: Pass

0.15 :j: Pass

0.15 :j: Pass

0.18 :j: Pass

0.15 :j: Pass

0.15 :j: Pass
•LARSON DAVIS

A PCB DIVISION
DOOOI.8407 Rev G
Certificate Number 2023004875
Negative Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651:2001 9.4.2 and ANSI S1.4:1983 (R2006) 8.4.2 Amplitude [dB] Crest Factor Test Result [dB] Limits [dB] Expanded Uncertainty [dB] 138.00 3 OVLD ±0.50
5 OVLD ± 1.00
10 OVLD ± 1.50
128.00 3 -0.12 ±0.50
5 -0.12 ± 1.00
10 OVLD ± 1.50
118.00 3 -0.13 ±0.50
5 -0.11 ± 1.00
10 -0.17 ± 1.50
108.00 3 -0.13 ±0.50
5 -0.13 ± 1.00
10 0.01 ± 1.50
-- End of measurement results--
Gain
Gain measured according to IEC 61672-3:201317.3 and 17.4 and ANSI S1.4-2014 Part 3: 17.3 and 17.4 Measurement Test Result (dB] Lower limit [dB] Upper limit [dB] 0 dB Gain 94.03 93.91 94.11
0 dB Gain, Linearity 29.14 28.31 29.71
20 dB Gain 94.03 93.91 94.11
20 dB Gain, Linearity 24.11 23.31 24.71
OBA Low Range 94.01 93.91 94.11
OBA Normal Range 94.01 93.20 94.80
-- End of measurement results--
Broadband Noise Floor
Self-Aenerated noise measured accordinA to IEC 61672-3:201311.2 and ANSI S1.4-2014 Part 3: 11.2 Measurement
A-weight Noise Floor
C-weight Noise Floor
Z-weight Noise Floor
Measured using 1/3-0ctave filters
: Measurement
10 Hz Signal
THD
THD+N
Test Result [dB] Upper limit [dB]

6.17 15.00

11.08 17.30

20.24 24.50
-- End of measurement results--
Total Harmonic Distortion
Test Result (dB]
137.58
-74.29
-66.76
Lower Limit [dB]
137.20
Upper Limit [dB]
138.80
-60.00
-60.00
-- End of measurement results--

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t

0.15 t
Expanded
Uncertainty [dB]

0.15 0.16

0.15 0.16

0.15 0.15
Expanded
Uncertainly [dB]

0.15 0.01 t

0.01 t
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Result
Pass
Pass
Pass
Pass
Pass
Pass
Result
Pass
Pass
Pass
Result
Pass
Pass
Pass

LARSON DAVIS -A PCB DIVISION
1681 West 820Noi1h
Provo,UT 84601,United States
716-684-000 I
•LARSON DAVIS

A PCB DIVISION
2023-4-2 IT09:47:07 Page 8 of 10 D0001.8407 Rev G
16 iii' 12
:!1.
g! 8
" ...J 4 .., e :, 0 Ill
"' " -4 :;
..

1.0 10.0
The SLM is set to low range and 20 dB gain.

Frequency (Hz]

6.30 8.00

10.00 12.50

16.00 20.00

25.00 31.50

40.00 50.00

63.00 80.00
100.00
125.00
160.00
200.00
250.00
315.00
400.00
500.00
630.00
800.00
1,000.00
1,250.00
1,600.00
2,000.00
2,500.00
3,150.00
4,000.00
5,000.00
6,300.00
8,000.00
10,000.00
12,500.00
16,000.00
20,000.00

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo,UT 84601,United States
7 I 6-684-0001
2023-4-21 T09:47:07
Certificate Number 2023004875
1/3-0ctave Self-Generated Noise
100.0 1000.0
Frequency [Hz]
I!! Measured •~fr Upper Unit
Test Result [dB) Upper limit [dB]

9.10 15.50

8.74 14.70

7.52 13.90

7.09 13.10

5.61 12.30

4.79 11.50

3.61 10.70

2.41 9.90

1.97 9.10

1.03 8.10

0.06 7.10
-0.82 6.10
-1.48 5.30
-2.59 4.70
-3.11 4.10
-4.04 3.60
-4.79 3.10
-5.55 2.70
-5.99 2.60
-6.61 2.60
-7.01 2.70
-7.28 2.80
-7.49 3.00
-7.60 3.20
-7.50 3.50
-7.17 3.80
-6.64 4.30
-5.86 4.90
-5.03 5.70
-4.64 6.40
-4.79 7.40
-4.64 8.60
-4.18 9.80
-3.51 11.20
-2.71 12.60
-1.82 14.00
-- End of measurement results--

10000.0 100000.0
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo,UT 84601,Unitcd States
716-684-0001
2023-4-2 IT09:47:07
Certificate Number 2023004875
-- End of Report--
Signatory: J,:y;,q-1, ~

•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Manufacturer: Customer: TMS Rental
Model Number: Address:

Serial Number: 338606
Asset ID: Cal Date / Cal ID:

Description: Due Date:

Sensitivity: 251.29 Hz 1000 Hz Temperature: 75 (24) °F (°C) -26.46 -26.54 dB re. 1V/Pa Humidity: 44 %

47.51 47.11 mV/Pa 990.6 mbar
Reference Sens: In Tolerance
Freq. Response: In Tolerance Polarization Voltage: 0 VDC Traceability: The calibration is traceable through NIST Project A3214.

Notes: Calibration results relate only to the items calibrated.

This certificate may not be reproduced, except in full, without written permission.

This calibration is performed in compliance with ISO 9001, ISO 17025 and ANSI Z540.

Measurement uncertainty (250 Hz sensitivity calibration) at 95% confidence level: 0.30 dB Calibrated per procedure PRD-P204.

User Note: As Found / As Left: In Tolerance.

Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)
Frequency
(Hz)
Upper
(dB)

20.4 -0.39 630 0.01 4500 -0.11
25 0.09 800 0.04 5000 -0.11

31.5 -0.02 1000 0.04 5600 -0.11
40 0.03 1120 0.04 6300 -0.13
50 0.05 1250 0.04 7100 -0.16
63 0.07 1400 0.04 8000 -0.13
80 0.05 1600 0.02 9000 -0.18
100 0.03 1800 0.02 10000 -0.29
125 0.05 2000 0.02 11200 -0.32
160 0.03 2240 0.00 12500 -0.03
200 0.02 2500 0.00 14000 0.28
250 0.01 2800 -0.01 16000 0.66
315 0.01 3150 -0.03 18000 0.70
400 0.01 3550 -0.02 20000 0.57
500 0.03 4000 -0.07
Technician: Ed Devlin Reference Equipment Used:

Manuf. Model Serial Cal. Date Due Date
Approval: GRAS 40AG 9542 2/28/2023 2/28/2024

~Certificate of Calibration~
Mar 23, 2023 14:55:14
Free-Field Microphone
377B02
PCB
Ambient Pressure:

Calibration Lab
CALIBRATION CERT 2649.01
Frequency Response with reference to level at 251.29 Hz -15
-10
-5
0 5
10 100 1000 10000
dB
Frequency [Hz]
Frequency Response Characteristics : The upper curve is the free field characteristic for the microphone with protection grid. The lower curve is the pressure response recorded by electrostatic actuator.

Sensitivity : The stated sensitivity is the open-circuit sensitivity. When used with a typical preamplifier the sensitivity will be 0.2 dB lower. ffTHE MODALSHOP

AN AMPHENOL COMPANY

I I I I I

I I I I I
I I I I 7

I I I I I
I I
I I I I 7
~
(Acciii:DITED)
10310 Aemhub Boullevard
Cincinnati , OHi 45215
Ph: 513.351.9919
Fax: 513 .458 .2172
www.moda lshop.com
I I I
I
I ,~

I I I --
" " ..
.........
- ......

Calibration Certificate
Certificate Number 2023005212
Customer:

The Modal Shop
10310 AeroHub Boulevard
Cincinnati, OH 45215, United States
Model Number 831
Serial Number 0001194
Test Results Pass
Initial Condition Inoperable
Description Larson Davis Model 831
Class 1 Sound Level Meter
Firmware Revision: 2.403
Procedure Number
Technician
Calibration Date
Calibration Due
Temperature
Humidity
Static Pressure
D0001.8378
Jacob Cannon
28Apr 2023

23.64 'C ± 0.25 'C

49.3 %RH ±2.0 %RH

86.79 kPa ± 0.13 kPa
Evaluation Method Tested electrically using Larson Davis PRM831 S/N 036756 and a 12.0 pF capacitor to simulate microphone capacitance. Data reported in dB re 20 µPa assuming a microphone sensitivity of 50.0 mV/Pa.

Compliance Standards Compliant to Manufacturer Specifications and the following standards when combined with Calibration Certificate from procedure D0001.8384:

IEC 60651 :2001 Type 1
IEC 60804:2000 Type 1
IEC 61252:2002
IEC 61672:2013 Class 1
IEC 61260:2001 Class 1
ANSI S1.4-2014 Class 1
ANSI S1 .4 (R2006) Type 1
ANSI S1 .25 (R2007)
ANSI S1 .43 (R2007) Type 1
ANSI S1.11 (R2009) Class 1
Issuing !ab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure (unless otherwise noted). It has been calibrated using measurement standards traceable to the International System of Units (SI) through the NaUonal Institute of Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of IS0/IEC 17025:2017. Test points marked with at In the uncertainties column do not fall within this laboratory's scope of accreditation.

The quality system is registered to ISO 9001 :2015.

This calibration is a direct comparison of the unit under test to the listed reference standards and did not involve any sampling plans to complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by the customer as needed.

The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM). A coverage factor of approximately 2 sigma (k=2) has been applied to the standard uncertainty to express the expanded uncertainty at approximately 95% confidence level.

This report may not be reproduced, except in full, unless permission for the publication of an approved abstract ls obtained in writing from the organization issuing this report.

Correction data from Larson Davis Model 831 Sound Level Meter Manual, 1831.01 Rev S, 2019-09-10 Calibration Check Frequency: 1000 Hz; Reference Sound Pressure Level: 114 dB re 20 µPa; Reference Range: 0 dB gain

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 8460 I, United States
7 l 6-684-000 l
~ .... •LARSON DAVIS
2023-4-28Tl2:45:06
(ACCRE,l),,IT.~Dj
C€Rl ~½2'101

A PCB DIVl8ION
D0001.8407 Rev G
Description
Hart Scientific 2626-S Humidityffemperature Sensor
SRS DS360 Ultra Low Distortion Generator

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-4-28Tl 2:45:06
Certificate Number 2023005212
Standards Used
Cal Date
2023-02-20
2023-03-31
Cal Due
2024-08-20
2024-03-31

of 10
Cal Standard
006946
007174

LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023005212
Z-weight Filter Response

1.0 0.8

0.6 0.4
iii'
:!!.

0.2 = 0,0
0 - - - - - -""
-0.2
-~ -0.4 ~
A -0.6
II
L •.• --···---·· -0.8
-1.0
10 100 1000
Frequency [Hz]
"""""""Nominal II Deviation Lower Limit Upper Limit
- -
II
1--\
10000

6.0 4.0
2Jj ~
3 0.0 5· !!!.

I""
-2.0 ~
~
-4,0ci:
.!!l
-6.0
100000
Electrical signal test of frequency weighting performed according to IEC 61672-3:2013 13 and ANSI S1.4-2014 Part 3: 13 for compliance to IEC 61672-1:2013 5.5; IEC 60651:2001 6.1 and 9.2.2; IEC 60804:2000 5; ANSI S1.4:1983 (R2006) 5.1 and 8.2.1; ANSI S1.4-2014 Part 1: 5.5 Frequency (Hz] Tut Result [dB]

6.31 63.10
125.89
251.19
501.19
1,000.00
1,995.26
3,981.07
7,943.28
15,848.93
19,952.62

LARSON DAVIS -A PCB DIVISION
1681 West 820 Notih
Provo, UT 84601, United States
7l6-684-000I
2023-4-28T! 2:45:06
-0.39
-0.03
-0.03
-0.04
-0.03

0.00 -0.02

0.00 0.05
-0.01
-0.27
Deviation [dBi Lower limit {dB] Upper limit [dB] Expanded Result Uncertainty (dB) -0.39 -0.63 0.12 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass
-0.04 -0.30 0,30 0.15 Pass
-0.03 -0.30 0.30 0.15 Pass

0.00 -0.30 0.30 0.15 Pass
-0.02 -0.30 0.30 0.15 Pass

0.00 -0.30 0.30 0.15 Pass

0.05 -0.30 0.30 0.15 Pass
-0.01 -0.42 0.32 0.15 Pass
-0.27 -0.71 0.41 0.15 Pass
-- End of measurement results~-

LARSON DAVIS

A PCB DIVISION

Certificate Number 2023005212
A-weighted 0 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 0.8

0.6 0.4
ai' 0.2
~
~ 0.0
g -0.2
w
-0.4
-0.6
-0.8
-1.0
I
.1
I ···-t .

I
' I
I

I I I I
-....,..,._,
• m I I - I I
i I
m
·1 . w ~
~1
~ . ., .

I I
I I I ! I I I I I
I i I I
I
\
I ···-·-··
\
-
I i

10.0 30.0 50.0 70.0 90.0 110.0 130.0
Level Injected [dB]
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1.4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1.4 (R2006) 6.9, ANSI S1.4-2014 Part 1: 5.6, ANSI S1.43 (R2007) 6.2 Level[dB] Error{dB) Lower limit [dB) Upper limit [dB] Expanded Uncertainty {dB)

26.00 0.24 -0.70 0.70 0.16

27.00 0.18 -0.70 0.70 0.16

28.00 0.12 -0.70 0.70 0.16

29.00 0.15 -0.70 0.70 0.16

30.00 0.17 -0.70 0.70 0.16

31.00 0.06 -0.70 0.70 Q.16

32.00 0.11 -0.70 0.70 0.16

33.00 0.09 -0.70 0.70 0.16

34.00 0.10 -0.70 0.70 0.16

35.00 0.10 -0.70 0.70 0.16

36.00 0.07 -0.70 0.70 0.16

39.00 0.05 -0.70 0.70 0.16

44.00 0.00 -0.70 0.70 0.16

49.00 0.00 -0.70 0.70 0.16

54.00 0.00 -0.70 0.70 0.16

59.00 0.01 -0.70 0.70 0.16

64.00 -0.01 -0.70 0.70 0.16

69.00 0.00 -0.70 0.70 0.16

74.00 0.00 -0.70 0.70 0.16

79.00 -0.01 -0.70 0.70 0.16

84.00 -0.01 -0.70 0.70 0.16

89.00 0.00 -0.70 0.70 0.16

94.00 0.00 -0.70 0.70 0.16

99.00 0.02 -0.70 0.70 0.16
104.00 0.00 -0.70 0.70 0.15
109.00 0.01 -0.70 0.70 0.15
114.00 0.00 -0.70 0.70 0.15
119.00 0.00 -0.70 0.70 0.15
124.00 0.00 -0.70 0.70 0.15
129.00 0.01 -0.70 0.70 0.15
134.00 0.00 -0.70 0.70 0.15
135.00 0.00 -0.70 0.70 0.15
136.00 0.00 -0.70 0.70 0.15
137.00 0.00 -0.70 0.70 0.15
138.00 0.00 -0.70 0.70 0.15
139.00 0.00 -0.70 0.70 0.15

LARSON DAVIS-A PCB DIVISION
150,0
Re,ult
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
,,..::''0~!>:\ 1681 West 820 North
,!l!.7 9 LARSON DAVIS Provo, UT 84601, United States ~
-;;<®;~/ 716-684-0001 CtRl #362101 A PCB DIVISION
2023-4-28112:45:06 Page 4 of 10 D0001.8407 Rev G
Level (dB]
140.00

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-000 l
2023-4-28112:45:06
Certificate Number 2023005212
Error (dB]
-0.02
Lower limit [dB] Upper limit [dB]
-0.70 0.70
-- End of measurement results--
~' ([4.CCR.EDITE_OJ
CERI U36:t2.0l

Expanded
Uncertainty [dB]

0.15 Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Cerlificate Number 2023005212
A-weighted 20 dB Gain Broadband Log Linearity: 8,000.00 Hz

1.0 0.8

0.6 0.4
iii' 0.2
:!!.
~ 0.0
g -0.2
w
-0.4
-0.6
-0.8
-1.0
i ' I
I
I ! I I
! I I !
I
·~~~--~
i - I I I
I I I
I
'
I
• I ! I ! I i
lll11!1hi!l'111g I I I - I !
I ! - i ' - ·1 i I
I

I I ' ' I I I
I I
I
I I
I I L. I I I

I I I I

10.0 30.0 50.0 70.0 90.0 110.0
Level Injected [dB]
Broadband level linearity performed according to IEC 61672-3:2013 16 and ANSI S1 .4-2014 Part 3: 16 for compliance to IEC 61672-1:2013

5.6, IEC 60804:2000 6.2, IEC 61252:2002 8, ANSI S1.4 (R2006) 6.9, ANSI S1.4-2014 Part 1: 5.6, ANSI S1.43 (R2007) 6.2 Level [dB]

21.00 22.00

23.00 24.00

25.00 26.00

27.00 28.00

29.00 30.00

31.00 32.00
33,00

34.00 35.00

36.00 37.00

38.00 39.00
44,00

49.00 54.00

59.00 64.00

69.00 74.00

79.00 84.00

89.00 94.00

99.00 104.00
109.00
114,00
115.00
116.00
Error [dB]

0.25 0.15

0.15 0.12

0.11 0.08

0.06 0.04

0.02 0.02

0.01 0.01

0.04 0,03
0,02

0.00 -0.01
-0.01
-0.01
-0.01

0.00 0.00

0.01 -0,01

0.00 0.00

0.01 0.01

0.02 0.02

0.02 0,00

0.00 0,00

0.00 -0.02
Lower limit {dB]
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0,70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0,70
-0.70
-0.70
-0,70
-0.70
-0.70
-0.70
-0.70
-0.70
-0.70
-0,70
-0.70
-0.70
-0.70
-0.70
Upper limit {dB]

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70
0,70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0.70

0.70 0,70

0.70 0.70

0.70 0.70

0.70 0,70
0,70

0.70 0.70
Expanded
Uncertainty [dB]

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.16

0.16 0.15

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
130.0

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001

LARSON DAVIS

A PCB DIVISION
2023-4-28112:45:06 Page 6 of 10 D0001.8407 Rev G
Certificate Number 2023005212
Level [dB]
117.00
118.00
119.00
120.00
Error (dB] Lower limit (dB] Upper limit [dB] Expanded
Uncertointy (dB]

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass

0.00 -0.70

0.00 -0.70

0.00 -0.70
-0.01 -0.70
-- End of measurement results--
Peak Rise Time
Peak rise time performed according to IEC 60651 :2001 9.4.4 and ANSI S1 .4:1983 (R2006) 8.4.4 Amplitnde (dB) Duration [µs]
139.00 40
30 Negative Pulse
Positive Pulse
Negative Pulse
Positive Pulse
Test Result (dB) Lower limit fdB]
135.99 134.51
135.99 134.51
135.06 134.51
135.06 134.51
-- End of measurement results--

0.70 0.70

0.70 0.70
Upper limit (dB)
136.51
136.51
136.51
136.51
Expanded
Uncertainty fdBJ

0.15 0.15

0.15 0.15
Result
Pass
Pass
Pass
Pass
Positive Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according lo IEC 60651 :2001 9.4.2 and ANSI S1 .4:1983 (R2006) 8.4.2 Amplltude [dB] Crest Factor
138.00
128.00
118.00
108.00

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-000 I
2023-4-28Tl2:4S:06
3 5
10 3
5 10
3 5
10 3
5 10
Test Result [dB] Limits fdB]
OVLD ±0.50
OVLD ± 1.00
OVLD ± 1.50
-0.12 ±0.50
-0.12 ± 1.00
OVLD ± 1.50
-0.13 ±0.50
-0.11 ± 1.00
-0.08 ± 1.50
-0.14 ±0.50
-0.13 ± 1.00

0.01 ± 1.50
-- End of measurement resultsH

Expanded Uncertainty [dB] Result

0.15 + Pass

0.15 + Pass

0.15 + Pass

0.15 + Pass

0.15 + Pass

0.15 + Pass

0.16 + Pass

0.15 + Pass

0.15 + Pass

0.18 + Pass

0.15 + Pass

0.15 + Pass
•LARSON DAVIS

A PCB DIVISION
D0001.8407 Rev G
Certificate Number 2023005212
Negative Pulse Crest Factor
200 µs pulse tests at 2.0, 12.0, 22.0, 32.0 dB below Overload Limit Crest Factor measured according to IEC 60651:2001 9.4.2 and ANSI S1.4:1983 {R2006) 8.4.2 Amplitude [dB] Crest Factor Test Result [dB] Limits [dBi Expanded Uncertainty [dB] 138.00 3 OVLD ± 0,50
5 OVLD ± 1.00
10 OVLD ± 1.50
128.00 3 -0.13 ± 0.50
5 -0.12 ± 1.00
10 OVLD ± 1.50
118.00 3 -0.13 ± 0,50
5 -0.13 ± 1.00
10 0.00 ± 1.50
108.00 3 -0.13 ±0.50
5 -0.12 ± 1.00
10 -0.25 ± 1.50
-- End of measurement results--
Gain
Gain measured according to IEC 61672-3:2013 17.3 and 17.4 and ANSI S1.4-2014 Part 3: 17.3 and 17.4 Measurement Test Result [dB] Lower limit [dBi Upper limit [dB] 0 dB Gain 94.00 93.91 94.11
0 dB Gain, Linearity 29.15 28.31 29.71
20 dB Gain 94.02 93,91 94.11
20 dB Gain, Linearity 24.04 23.31 24.71
OBA Low Range 94.01 93.91 94.11
OBA Normal Range 94.01 93.20 94.80
-- End of measurement results--
Broadband Noise Floor
Self-Qenerated noise measured accordinQ to IEC 61672-3:2013 11.2 and ANSI S1.4-2014 Part 3: 11.2 Measurement
A-weight Noise Floor
C-weight Noise Floor
Z-weight Noise Floor
Measured using 1/3-0ctave filters
• Measurement
10 Hz Signal
THD
THD+N
Test Result {dB] Upper limit {dBi

5.31 15.00

11.75 17.30

22.45 24.50
-- End of measurement results--
Total Harmonic Distortion
Test Result {dB]
137.53
-71.61
-65.55
Lower Limit [dB]
137.20
Upper Limit [dB]
138.80
-60.00
-60.00
-- End of measurement results--

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

0.15 :j:

Expanded
Uncertainty (dB]

0.15 0.16

0.15 0.16

0.15 0.15
Expanded
Uncertainty [dB]

0.15 0.01 :j:

0.01 :j:

Result
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Result
Pass
Pass
Pass
Pass
Pass
Pass
Result
Pass
Pass
Pass
Result
Pass
Pass
Pass

LARSON DAVIS-A PCB DIVISION
168 i West 820 North
Provo, UT 84601, United States
716-684-0001
•LARSON DAVIS

A PCB DIVISION
2023-4-28112:45:06 Page 8 of!O D0001.8407 Rev G
16 iii' 12
:!!.
1 8
.J 4 .,,
I!! 0 :,
"' "' " -4 :,;
..

1.0 10.0
The SLM Is set to low range and 20 dB gain.

Frequency [Hz]

6.30 8.00

10.00 12.50

16.00 20.00

25.00 31.50

40.00 50.00

63.00 80.00
100.00
125.00
160.00
200.00
250.00
315.00
400.00
500.00
630.00
800.00
1,000.00
1,250.00
1,600.00
2,000.00
2,500.00
3,150.00
4,000.00
5,000.00
6,300.00
8,000.00
10,000.00
12,500.00
16,000.00
20,000.00

LARSON DAVIS-A PCB DIVISION
1681 West 820 No11h
Provo, UT 84601, United States
716-684-0001
2023-4-28'1'12:45:06
Certificate Number 2023005212
1/3-0ctave Self-Generated Noise
100.0 1000.0
Frequency [Hz]
II Measured Upper Unit
Test R .. ult [dB] Upper limit [dB]

10.77 15.50

9.59 14.70

8.60 13.90

7.46 13.10

7.13 12.30

5.07 11.50

4.84 10.70

3.84 9.90

2.98 9.10

1.82 8.10

0.90 7.10
-0.12 6.10
-1.02 5.30
-1.59 4.70
-2.54 4.10
-3.26 3.60
-4.09 3.10
-4.76 2.70
-5.32 2.60
-6.12 2.60
-6.64 2.70
-7.13 2.80
-7.53 3.00
-7.85 3.20
-7.95 3.50
-7.98 3.80
-7.91 4.30
-7.61 4.90
-7.25 5.70
-6.80 6.40
-6.22 7.40
-5.57 8.60
-4.79 9.80
-3.97 11.20
-3.06 12.60
-1.95 14.00
-- End of measurement results--

10000.0 100000.0
R .. ult
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
•LARSON DAVIS

A PCD DIVISION
D000l.8407 Rev G

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-0001
2023-4-28TI 2:45:06
Certificate Number 2023005212
-- End of Report--
Signatory: JM-<!fL ~

•LARSON DAVIS

A PGB DIVISION
D000l.8407 Rev G
Certificate of Calibration and Compliance ~
Model: 377802 Manufacturer: PCB
Serial: 344581 Description : l/2
11 Free~Field Microphone
Calibration Environ111e11tal Co11ditions
Environmental test conditions as printed on microphone calibration chart.

Reference Eq11ip111e11t
Manufacturer I Mode!# I Serial # I Control# I Cal Date I Due Date National Instruments PClc-6351 01896F08 Ci\1918 10/19/2021 04/19/2023 Larson Davis PRM915 131 Ci\1205 03131/2022 03/31/2023
Larson Davis PRM902 4943 Ci\1162 06/24/2022 06/23/2023
Larson Davis PRM916 129 CAI084 06/2312022 06/2312023
Larson Davis CAL250 5025 Ci\1277 05/10/2022 05/10/2023
Larson Da\•is 2201 144 CA 1409 04/25/2022 04/25/2023
Larson Davis GPRM902 5460 Ci\2151 05/20/2022 05/19/2023 Larson Davis PRM915 147 Ci\2179 08/15/2022 08115/2023
Larson Dnvis PRi\951-4 024! Ci\1449 06/23/2022 06/23/2023 Brucl & Kjacr 4192 3259547 Ci\3214 02/03/2022 02/03/2023 Newport iTHX-SD/N 1080002 CAl511 02/07/2022 02/0712023
PCH 685 I 0-02 NIA Ci\2672 02/09/2022 02/09/2023
frequency sweep performed with ll&K UA0033 elcctros1a1tc actuator.

Conditio11 of Unit
As Found : n/a -"---':..__------------------------~
As Left: New Unit, In Tolerance
Notes
l. Calibration or reference equipment is traceable to one or more or the following National Labs; NIST, PTB or DFM.

2. This certificate shall not be reproduced, except in full, without written approval from PCB Piezotronics, Inc.

J, Calibralion is performed in compliance wilh ISO I 0012-I, ANSI/NCSL Z540.3 and ISO 17025.

4. Measurement results relate only to the items tested. Rcfor lo Manufacturer's Specification Sheet for performance details.

5. Open Circuit Sensitivity is measured using the voltage insertion method following procedure AT603-5.

6. Measurement uncertainty (95% confidence level with co\'erage factor of 2) for sensitivity is +/-0.20 dB. 7, Uni! calibrated per ACS-20.

8. Product is compliant with specification if measured value is within or equal to the specification lolerance. Product is not compliant with specification if measured value fo!!s outside of the specification tolerance.

Technician: Lconnrd Luknsik. r)./ Dntc; 0 l/2012023
*PCB PIEZOll?ONICS""
3425 WALDEN AVENUE • DEPEW, NY 14043
TEL: 888-684•0013 - FAX: 716-685-3886 - www.pcb.com
I
PAGE 1 of2 ID. CALI 12·37510S)J33 70St0
11111111111111111111111111111111111 IIIII lllll lllll lll!l 11111111111111111111111111111111111 lllll lllll 1111111111111111111111111 ~ Calibration Report ~
Model: 377B02 Manufacturer : PCB
Serial: 344581 Description : l/2
11 Free-Field Microphone
C11libr11tio11 Data
Open Circuit Sensitivity at 2S1.2 Hz: 49.74 mV/Pa Polarization Voltnge, External : 0 V Capacitance: 13.23 pF
1[
l
~

5.0 -

2.5 0.0 -
-2.5 -
-5.0 -
-7.5 ' . -
-10.0-

10.0 Frequency
(Hz)

20.00 25.10

31.60 39.80

50.10 6110

79.40 100.00
125,90
158.50
199.50
251.20
316.20
398.10
501.20
631.00
794.30
1000.00
1059.30
I 122.00
1188.50
1258.90
1333.50
1412.50
1496.20
-26.07 dB re I V/Pa
Temperature: 68 °P (20 °C) Ambient Pressure: 979 mbar
Frequency Response (0 dB at 251.2 Hz)
Solid line: Free-field response of microphone al 0° sound incidence with standard grid cap.

Dash line : Pressure repome as tested with elcc1rosta1ic 11c1ua1or.

Pressure
(dO)
-0.02

0.o7
0,05

0.13 0.03

0.05 0.04
O.oJ

0.02 0.02
O.QI

0.00 -0.01
-0.02
-0.03
-0.05
-0.07
-0.1 I
-0.12
-0.13
-0.15
-0.15
-0.17
-0.20
-0.21
t !"ITT I T ,. •• , i'T
100.0
Free-Field Frequency
(dB) (flz)
-0.02 1584.90

0.o7 1678.80

0.05 1778.30

0.13 1883.60

0.03 1995.30

0.05 2113.50

0.04 2238.70

0.03 2371.40

0.02 2511.90

0.02 2660.70

0.01 2818.40

0.00 2985.40

0.00 3162.30
-0.02 3349.70

0.01 3548.IO
-0.01 3758.40

0.02 3981.10

0.01 4217.00

0.01 4466.80

0.01 4731.50

0.00 5011.90

0.01 5308.80

0.01 5623.40
-0.01 5956.60
-0.01 6309.60
Pressure
(dB)
-0.24
-0.25
-0.29
-0.33
-0.36
-0.39
-0.44
-0.50
-0.55
-0.60
-0.67
-0.75
-0.82
-0.91
-1.05
-1.16
-1.27
-1.40
.1.54
-1.70
-1.87
-2.07
-2.27
-2.49
-2.70
T
1000.0
Frequency (l-lz)
Free-Field Frequency
(dB) (Hz)
-0.03 6683.40
-0.02 7079.50
-0.04 7498,90
-0.05 7943.30
-0.05 8414.00
-0,05 8912.50
-0.07 9440.60
-0.09 10000.00
-0.09 10592.50
-0.09 11220.20
-0.11 ! 1885.00
-0.13 !2589JO
-0.14 !3335.20
..0.17 14125.40
-0.23 14962.40
-0.26 !5848.90
-0.27 16788.00
-0.29 !7782.80
-0.31 18836.50
-0.33 !9952.60
-0.34
-0.37
-0.39
-0.42
-0.41
Pressure
(dB)
•2,98
.J,22
-3.54
-3.83
-4.21
-4.57
-5.01
-5.58
-6.05
-6.59
-6.95
-7.46
-7.56
-7,73
-7.88
-8.03
-8.26
-8.62
-9.!2
-9.96
Relative Humidity: 38 %
10000.0
Free-Field
(dB)
-0.46
-0.44
-0.47
-0.44
-0.49
-0.46
-0.49
-0.63
-0.65
-0.73
-0.63
-0.69
-0.37
-0.14

0.09 0.32

0.46 0.49

0.39 -0.03
Technician: ------'L"e-'-01"',a'-r"-d -"L"'u'-ka=csc.ikc.· --It~' 1.,/c__ Date: -----'-O'-l/=-20'--12"-0"-2-'-J ___ _ PAOE2of2
M f'A'ccy ED IT jm)
OO!BWl01iCUlt11ll.Ol
*PCB PIE:lOlRONICS""
3425 WALDEN AVENUE • DEPEW, NY 140113
TEL: 888-684-0013 • FAX: 716-685-3886 • www.pcb.com
111111111111111 IIIII IIIII IIIII IIIII IIIII 11111 lllll 111111111111111 IIIII 111111111111111111111111111111111111111111111111111111 100000.0
ID. CALI 12-37570!3133.70!+0
Calibration Certificate
Certificate Number 2023011260
Customer:

The Modal Shop
10310 AcroHub Boulevard
Cincinnati, OH 45215, United States
Model Number CAL200
Serial Number 21607
Test Results Pass
Initial Condition As Manufactured
Description Larson Davis CAL200 Acoustic Calibrator
Procedure Number
Technician
Calibration Date
Calibration Due
Temperature
Humidity
Static Pressure
D0001.8386
Scott Montgomery
28 Aug 2023
24 ·c ± o.3 ·c
37 %RH ± 3 %RH
101.1 kPa ± 1 kPa
Evaluation Method The data is aquired by the insert voltage calibration method using the reference microphone's open circuit sensitivity. Data reported in dB re 20 µPa.

Compliance Standards Compliant to Manufacturer Specifications per D0001.8190 and the following standards:

IEC 60942:2017 ANSI S1 .40-2006
Issuing lab certifies that the instrument described above meets or exceeds all specifications as stated in the referenced procedure (unless otherwise noted). It has been calibrated using measurement standards traceable to the SI through the National Institute of Standards and Technology (NIST), or other national measurement institutes, and meets the requirements of ISO/IEC 17025:2017.

Test points marked with a t: in the uncertainties column do not fall within this laboratory's scope of accreditation.

The quality system is registered to ISO 9001:2015.

This calibration is a direct comparison of the unit under test to the listed reference standards and did not involve any sampling plans to complete. No allowance has been made for the instability of the test device due to use, time, etc. Such allowances would be made by the customer as needed.

The uncertainties were computed in accordance with the ISO Guide to the Expression of Uncertainty in Measurement (GUM). A coverage factor of approximately 2 sigma (k=2) has been applied to the standard uncertainty to express the expanded uncertainty at approximately 95% confidence level.

This report may not be reproduced, except in full, unless permission for the publication of an approved abstract is obtained in writing from the organization issuing this report.
t
Description
Agilent 34401A DMM
Larson Davis Model 2900 Real Time Analyzer
Microphone Calibration System
1/2" Preamplifier
Larson Davis 1/2" Preamplifier 7-pin LEMO
1/2 inch Microphone - RI -200V
Pressure Sensor

LARSON DAVIS -A PCB DIVISION
1681 West 820 North
Standards Used
Cal Date Cal Due Cal Standn1·d
06/21/2023 06/21/2024 001021
03/31/2023 03/31/2024 001051
02/22/2023 02/22/2024 005446
08/16/2023 08/16/2024 006506
08/04/2023 08/04/2024 006507
10/05/2022 10/05/2023 006510
11/02/2022 11/02/2023 007827
Provo, UT 8460 I, United States
716-684-000 I A PCB DIVISION
R/lR/2023 3:45: 15PM Page 1 of 3 D0001.8410 Rev F
I
Nominal Level Pressure
(dB( (kPa(
94 101.1
114 100.9
Nominal Level Pressure
(dB] (kPa(
94 101.1
114 100.9
Nominnl Level Pressure
(dB] (kPa]
94 101.1
114 100.9
Tested at: 114 dB, 24 °C, 32 %RH
Nominal Pressure Pressui·e
(kP11( [kPa(
108.0 107.7
101.3 101.2

92.0 91.9

83.0 82.9

74.0 74.0

65.0 64.9
Tested at: 114 dB, 24 ·c, 32 %RH
Nomlnnl Pressure Pressure
(kPa) (kPa]
108.0 107.7
101.3 101.2

92.0 91.9

83.0 82.9

74.0 74.0

65.0 64.9

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
716-684-000 I
8/28/2023 3:45: ISPM
Certificate Number 2023011260
Output Level
Test Result Lower llmil Upper limit Expanded Uncertainty (dB( (dB( (dB] (dB) Result

94.02 93.80 94.20 0.15 Pass
114.01 113.80 114.20 0.14 Pass
--End of measurement results--
Frequency
Test Result Lower limit U1>per limit Ex1n111ded Uncertainty (Hz] (Hz) (Hz( (Hz] Result
1,000.11 993.00 1,007.00 0.20 Pass
1,000.11 993.00 1,007.00 0.20 Pass
--End of measurement results--
Total Harmonic Distortion + Noise (THD+N)
Test Result Lower limit Upper limit Expanded Uncertainly (%) [%) (%) (%) Result

0.38 0.00 2.00 0.25 :t: Pass

0.34 0.00 2.00 0.25 :t: Pass
--End of measurement results--
Level Change Over Pressure
Test Result Lower limit Upper limit Expnnded Uncertainty [dB) (dB) (dB) (dB) Result
-0.03 -0.25 0.25 0.04 :t: Pass

0.00 -0.25 0.25 0.04 :t: Pass

0.03 -0.25 0.25 0.04 :t: Pass

0.03 -0.25 0.25 0.04 :t: Pass
-0.01 -0.25 0.25 0.04 :t: Pass
-0.09 -0.25 0.25 0.04 :t: Pass
--End of measurement results--
Frequency Change Over Pressure
Test Result Lower limit U1>11er limit Expanded Uncertainty (Hz( [Hz] (Hz( (Hz( Result

0.00 -7.00 7.00 0.20 :t: Pass

0.00 -7.00 7.00 0.20 :t: Pass

0.00 -7.00 7.00 0.20:f: Pass

0.00 -7.00 7.00 0.20 :t: Pass
-0.01 -7.00 7.00 0.20 :t: Pass
-0.01 -7.00 7.00 0.20:f: Pass
--End of measurement results--
•LARSON DAVIS

A PCB DIVISION

Certificate Number 2023011260
Total Harmonic Distortion + Noise (THD+N) Over Pressure Tested at: 114 dB, 24 •c, 32 %RH
Nominal Pressure Pressure
(kPa) (kPa)
108.0 107.7
101.3 101.2

92.0 91.9

83.0 82.9

74.0 74.0

65.0 64.9

LARSON DAVIS-A PCB DIVISION
1681 West 820 North
Provo, UT 84601, United States
7 I 6-684-000 I
8/28/2023 3:45: I 5PM
Test Result Lower limit U1>per limit Expanded Uncertainty (%1 [%) [%) [%) Result

0.32 0.00 2.00 0.25:): Pass

0.32 0.00 2.00 0.25:): Pass

0.30 0.00 2.00 0.25:): Pass

0.30 0.00 2.00 0.25:): Pass

0.29 0.00 2.00 0.25:): Pass

0.30 0.00 2.00 0.25:): Pass
--End of measurement 1·cs111ts--
Signatory: Su,ft /14~'1
•LARSON DAVIS

A PCB DIVISION

•
Model CAL200 Relative SPL vs. Temperature
Larson Davis Model CAL200 Serial Number: 21607
Model CAL200 Relative SPL vs. Temperature at 50% RH.

A 2559 Mic (SN: 2893) with a PRM901 Preamp (SN: 0160), station 5 was used to check the levels.

2.0 1.6

1.2 0.8
....., co 0.4
'1J '-'
...J
Q.
(/)

0.0 I-
Q)
> :p
Ill
ai a'. -0.4
-0.8
-1.2
-1.6
-2.0
-15 -10
Test Date: 17 Jul 2023 2:30:52 PM
i t I
-5 0 5 10 15 20 25 30 35 40
Temperature (°C)
O. ldB expanded uncertainty at N95% confidence level (k=2) Sequence File: CAL200.SEQ
Test Location: Larson Davis - A PCB Division
1681 West 820 North, Provo, Utah 84601
Tel: 716 684-0001 www.LarsonDavis.com
I
45 50 55

•
Model CAL200 Relative Frequency vs. Temperature
Larson Davis Model CAL200 Serial Number: 21607
Model CAL200 Relative Frequency vs. Temperature at 50% RH.

A 2559 Mic (SN: 2893) with a PRM901 Preamp (SN: 0160), station 5 was used to check the levels. 12 10
8 6
4 ,....

N
J:
'-'
cj" 2
C
Q)
:::,
CT 0
1 ~ IL
Q)
> -2 :p
ro
& -4
-6
-8
-10
-12
-15 -10
Test Date: 17 Jul 2023 2:30:52 PM
I I I
-5 0 5 10 15 20 25 30 35 40
Temperature (°C)

1.0 Hz expanded uncertainty at ~95% confidence level (k=2) Sequence File: CAL200.SEQ
Test Location: Larson Davis -A PCB Division
1681 West 820 North, Provo, Utah 84601
Tel: 716 684-0001 www.LarsonDavis.com
I
45 so 55

Noise Monitoring Technical Report C-1 ESA / 202300046.01 Pacific Airshow Huntington Beach December 2023
Appendix C – Airshow Schedule

Air Boss: Backup:

Discrete:

N933GC & N133DV
High-Speed Pass & Water Drop
126.4121.05
134.7
Ken Ashmore:

Wayne Boggs:

Ray Shaw:

Kellie Hudson:

Chris Tibbetts:

Aaron Fitzgerald
714 783-6156
813 340-5623
619 886-6950PACIFIC AIRSHOW 2023Draft Performer Schedule - Fri 29 Sept Version 4 571 335-2515
332 201-4039Start End Duration Performer Airfield AirspaceDescription 9:30 0:45 Thunderbirds DiamondPractice 15k
10:16 0:02 Matt Jolley Show Intro --
10:18 0:02 Australian Anthem --
10:20 0:02 Canadian Anthem --
10:22 0:08 Leap Frogs Flag JumpUSA Anthem 10k
10:31 0:10 Sammy MasonEdge 540 (N540SA)
10:42 0:14 Ace Maker T-33 Jet 2-Ship
10:57 0:06 Trump B757 5K
11:04 0:10 Tom LarkinSubSonex Mini Jet 5k
11:15 0:15 USN F/A-18 Super HornetDemo 15k
11:31 0:05 CA ANG C-130J
11:37 0:07 Lyon Air Museum - FlybysC-47 Skytrain 5k
11:45 0:50 7k
12:36 0:07 BlackFly 5k
12:44 0:15 USN F-35C Demo 15k
13:00 0:10
13:11 0:08 FedEx B757Flybys - 3 passes 5k
13:20 0:10 US Army Helo Demo 5k
13:31 0:15 US Army Golden Knights 10k
13:47 0:18 USN Growler Demo 10k
14:06 0:08 Red Bull Helicopter 5k
14:15 0:03 USAF KC-135
14:19 0:18 USAF F-35A Demo 15k
14:37 0:14 USAF Heritage FlightF-35A, F-22, P-51D 5k
14:51 0:15 USAF F-22 Raptor Demo 7k
15:07 0:12 Michael GoulianExtra 330SC 5k
15:20 0:11 5k
15:36 0:45 Thunderbirds 15k
- 10:15 SLI
- 10:18 --
- 10:20 --
- 10:22 --
- 10:30 SLI
- 10:41 SNA
- 10:56 SNA20R
- 11:03 PBI
- 11:14 SNA
- 11:30 SLI
- 11:36 NTD
- 11:44 SNA20R
- 12:35 SLI
- 12:43 FromBeach
- 12:59 SLI
- 13:10 SNA
- 13:19 LAX
- 13:30 SLI
- 13:46 SLI
- 14:05 SLI
- 14:14 SNA
- 14:18 KRIV
- 14:37 SLI
- 14:51 SLI
- 15:06 SLI
- 15:19 SNA
- 15:31 SNA20R
- 16:21 SLI
F-16 x 4
Jump aircraft USN SH60
Firefighting Demo
C-47 "Willa Dean" - multiplepasses at airboss' discretion F-35C x2 "Raider" airborne - (1) demo, (1) sneakpass - depart together Northbound Reigning Red Bull Air Race Champ!MX2 & Extra 300L
Flybys - expect 3 passes orat air boss' discretion
3 UH60s and 2 UH72 "Sokols"2616th Aviation Batallion, Fort Irwin, CA From Army UH60
Solo aerobatics in the MBB Bo-105
Flyby boom-down 500'
N32KP
6x F-16
5k
7k
5k
Canadian ForcesSnowbirds
Matt Hall &Emma McDonald 5k
5k
Jet WacoJarrod Lindemann
T-33 x2 - Greg Colyer and Rob "Scratch" Mitchell

ZOOM BRIEFER PT MUGU

ZOOM BRIEFER MARCH ARB

Air Boss: Backup: Discrete:

High-Speed Pass & Water Drop
126.4121.05134.7
Ken Ashmore: Wayne Boggs:

Ray Shaw: Kellie Hudson: Chris Tibbetts:

Aaron Fitzgerald
714 783-6156813 340-5623
619 886-6950PACIFIC AIRSHOW 2023Draft Performer Schedule - Sat 30 SeptVersion 4 571 335-2515332 201-4039Start End Duration Performer Airfield AirspaceDescription 10:04 0:04 Leap Frogs Streamer Drop 5k
10:09 0:04 OC Fire AuthorityWater Drop 5k
10:14 0:02 Matt Jolley Show Intro --
10:16 0:02 Australian Anthem --
10:18 0:02 Canadian Anthem --
10:20 0:02 USA Anthem --
10:22 0:08 Leap Frogs 10k
10:31 0:05 USAF F-15Bayou Militia 10k
10:37 0:10 Sammy MasonEdge 540
10:48 0:14 Ace Maker T-33 Jet 2-Ship
11:03 0:10 Tom LarkinSubSonex Mini Jet 5k
11:14 0:15 USN F/A-18 Super HornetDemo 15k
11:30 0:05 CA ANG C-130J
11:36 0:07 Lyon Air Museum - FlybysC-47 Skytrain 5k
11:44 0:40 7k
12:25 0:08 BlackFly 5k
12:34 0:15 USN F-35C Demo 15k
12:50 0:12 Michael GoulianExtra 330SC 5k
13:03 0:08 FedEx B757Flybys - 3 passes 5k
13:12 0:12 USN Growler Demo 10k
13:25 0:08 Red Bull Helicopter 5k
13:34 0:05 USAF F-15Bayou Militia 10k
13:40 0:05 USAF KC-135
13:46 0:03 Tucker Hess Flyby
13:50 0:15 USAF F-35A Demo 15k
14:06 0:10 USAF Heritage FlightF-35A, F-22, P-51D 5k
14:17 0:15 USAF F-22 Raptor Demo 7k
14:33 0:08 US Army Helo Demo 5k
14:42 0:10
14:53 0:15 US Army Golden Knights 10k
15:13 0:45 Thunderbirds 15k
- 10:08 SLI
- 10:13 FUL &SLI
- 10:16 --
- 10:18 --
- 10:20 --
- 10:22 --
- 10:30 SLI
- 10:36 SLI
- 10:47 SNA
- 11:02 SNA20R
- 11:13 SNA
- 11:29 SLI
- 11:35 NTD
- 11:43 SNA20R
- 12:24 SLI
- 12:33 FromBeach
- 12:49 SLI
- 13:02 SNA
- 13:11 LAX
- 13:24 SLI
- 13:33 SNA
- 13:39 SLI
- 13:45 KRIV
- 13:49 SNA
- 14:05 SLI
- 14:16 SLI
- 14:32 SLI
- 14:41 SLI
- 14:52 SNA
- 15:08 SLI
- 15:58 SLI
Not in to the wetlands, please.

Bell 412 x2 + CH47 Chinook - - American Flag banner tow onouter edge of box American Flag banner tow on outer edge of box
American Flag banner tow on outer edge of box
American Flag banner tow on outer edge of box
SH60 Helo -
F-15 flybys
N540SA
Firefighting Demo
C-47 "Willa Dean" - multiplepasses at airboss' discretion F-35C x2 "Raider" airborne - (1) demo, (1) sneakpass - depart together Northbound N821MG
Flybys - expect 3 passes orat air boss' discretion
Solo aerobatics in the MBB Bo-105
F-15 flybys
Flyby boom-down 500'
3 UH60s and 2 UH72 "Sokols"2616th Aviation Batallion, Fort Irwin, CA Reigning Red Bull Air Race Champ!MX2 & Extra 300L
From Army UH60
6x F-16

ZOOM BRIEFERFULLERTON

ZOOM BRIEFER PT MUGU
5k
7k
5k
Canadian ForcesSnowbirds
5k
5k
Matt Hall &Emma McDonald 5k
T-33 x2 - N933GC & N133DVGreg Colyer and Rob "Scratch" Mitchell

ZOOM BRIEFER MARCH ARB

The Pacific Airshow Huntington Beach Project 5-1 ESA/202300046.01 Final Environmental Impact Report August 2025

CHAPTER 5
Mitigation Monitoring and Reporting Program

5.1 CEQA Requirements
Section 15091(d) and Section 15097 of the CEQA Guidelines require a public agency to adopt a program for monitoring or reporting on the changes it has required in the project or conditions of approval to substantially lessen significant environmental effects. This Mitigation, Monitoring and Reporting Program (MMRP) summarizes the mitigation commitments identified in the Pacific Airshow (Airshow or Project) EIR (State Clearinghouse No. 2024020006). Mitigation measures are presented in the same order as they occur in the Draft EIR. Further, to ensure enforceability of the biological monitoring efforts, a Project Description feature voluntarily is included in the MMRP that requires biological monitoring before and during the Airshow.

Because there are no significant impacts associated with the temporary Airshow activities on biological species, biological monitoring is not required as a mitigation measure.

The columns in the MMRP table provide the following information:
• Mitigation Measure(s): The action(s) that will be taken to reduce the impact to a less-than- significant level.
• Implementation, Monitoring, and Reporting Action: The appropriate steps to implement and document compliance with the mitigation measures.
• Responsibility: The agency or private entity responsible for ensuring implementation of the mitigation measure. However, until the mitigation measures are completed, the City, as the CEQA Lead Agency, remains responsible for ensuring that implementation of the mitigation measures occur in accordance with the MMRP (CEQA Guidelines, Section 15097(a)). • Monitoring Schedule: The general schedule for conducting each task. Because the proposed project does not include a construction phase, the general schedule is summarized as either “prior to operation” and/or “during operation”.

Chapter 5. Mitigation Monitoring and Reporting Program
The Pacific Airshow Huntington Beach Project 5-2 ESA/202300046.01 Final Environmental Impact Report August 2025

TABLE 5-1

MITIGATION MONITORING AND REPORTING PROGRAM FOR THE PACIFIC AIRSHOW HUNTINGTON BEACH PROJECT Mitigation Measures Implementation, Monitoring, and Reporting Action Responsibility Monitoring Schedule Hazards and Hazardous Materials
HAZ-1: A qualified avian biologist will conduct one Wildlife Hazard Site Visit (WHSV) prior to the start of the annual Airshow (beginning in 2024) following the protocol developed by the FAA in the Protocol for the Conduct and Review of Wildlife Hazard Site Visits, Wildlife Hazard Assessments, and Wildlife Hazard Management Plans (Federal Aviation Administration, Advisory Circular 150/5200-38, August 2018 to evaluate potential risk of wildlife strikes at airports, specifically for the proposed temporary aircraft landing pad on the beach during all future Airshow events. The WHSV shall include field observations conducted over one day at dawn, noon, and dusk from a variety of pre- determined locations to ensure complete visual coverage of the location of the temporary runway and immediate surroundings. All signs of birds, mammals, habitat attractants, and wildlife/habitat relationship observations shall be recorded.

A wildlife hazard site visit memorandum shall be prepared and include a list of wildlife species or signs observed during the surveys, federal and state status of the species observed, habitat features that may encourage wildlife, natural and artificial wildlife attractants, strike data analysis, and recommendations to reduce wildlife hazards.

Recommendations may include developing a long-term management strategy that includes wildlife hazard management and/or reduction in flights under 500 feet above ground level.
• Conduct one WHSV prior to the start of the annual
Airshow prior to the start of the annual Airshow.
• Conduct field observations over one day at dawn, noon, and dusk from a variety of pre-determined locations to
ensure complete visual coverage of the location of the
temporary runway and immediate surroundings prior to
the start of the annual Airshow.
• Record all signs of birds, mammals, habitat attractants, and wildlife/habitat relationship observations prior to the start of the annual Airshow.
• Prepare a wildlife hazard site visit memorandum
following the annual Airshow.

Applicant Prior to the start of the
annual Airshow
HAZ-2: A qualified biological monitor will be on-site during event performances for the duration of the event (3-5 days) to document bird activity during aircraft flyovers and take-off and landing within the Show Center Area. Biological monitoring will also inform the recommendations to reduce wildlife hazards. Based on monitoring observations, recommendations may include following standard best management practices such as properly disposing of trash to avoid attracting wildlife to the Show Center Area and/or employing means of harassment (e.g., lasers) to disperse birds. • Monitor and document bird activity during aircraft
flyovers and take-off and landing within the Show Center Area during the annual Airshow.

Applicant During the annual
Airshow
NOI-1: The applicant shall implement the following measures for the duration of the event:
• The nearest speaker shall be placed at least 475 feet away from any nearby sensitive receptor and any subsequent speakers shall be separated from other speakers by 25 feet parallel to Pacific Coast Highway. Speakers shall also be positioned in a manner that would not point directly towards any nearby sensitive receptor and, instead, face the beach/ocean.
• A temporary noise barrier of at least 10 feet in height and constructed of plywood or using a sound blanket shall be installed on public property nearest to the sensitive receptors to the west of the proposed music festival area (Huntington Pacific Beach House Condo complex at 701 Pacific Coast Highway). The temporary noise barriers shall block the line-of-sight between the music festival attendees and similarly elevated ground-level noise-sensitive receptors.
• Placement of the nearest speaker shall be placed at
least 475 feet away from any nearby sensitive receptor
and any subsequent speakers shall be separated from
other speakers by 25 feet parallel to Pacific Coast
Highway. Speakers shall also be positioned in a manner
that would not point directly towards any nearby
sensitive receptor and, instead, face the beach/ocean.
• Placement of a temporary noise barrier shall be installed on public property nearest to the sensitive receptors to the west of the proposed music festival area (Huntington Pacific Beach House Condo complex at 701 Pacific
Coast Highway).

Applicant During the annual
Airshow
Chapter 5. Mitigation Monitoring and Reporting Program
The Pacific Airshow Huntington Beach Project 5-3 ESA/202300046.01 Final Environmental Impact Report August 2025

Mitigation Measures Implementation, Monitoring, and Reporting Action Responsibility Monitoring Schedule Project Design Feature
Project Design Feature 1: The following will occur to ensure that potential impacts to nesting birds remain less than significant:
• Pre-airshow activities would occur at least one week beyond the end of the identified nesting season for the California least tern and the western snowy plover and well beyond the end of the identified nesting season for the light-footed Ridgway’s rail and general avian species.
• Monitoring efforts will be conducted before and during the Airshow to survey for nests and provide measures to avoid potential impacts.
• Daily briefings have and will continue to occur, although the outcome of those briefings cannot be guaranteed.
• Pre-airshow activities would occur at least one week
beyond the end of the identified nesting season for the California least tern and the western snowy plover and
well beyond the end of the identified nesting season for the light-footed Ridgway’s rail and general avian species. • Monitoring efforts to be conducted prior and during the annual Airshow to survey for nests and provide
measures to avoid potential impacts.
• Daily briefings to occur prior to the start of the annual Airshow.

Applicant Prior to the start of the
annual Airshow and
during the annual
Airshow

I
Chapter 5. Mitigation Monitoring and Reporting Program
The Pacific Airshow Huntington Beach Project 5-4 ESA/202300046.01 Final Environmental Impact Report August 2025

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