https://www.blueridgeresearch.com/noise-models-image-collection daily 0.75 2025-04-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797930140-WP2N5YOUE2P8EEL0GIB0/Overall_Annual_L50_dBA_Day_ColorbarSouth.png Noise Models Job Collection - Ambient Soundscape Model BRRC developed a machine learning model to predict the average ambient sound level anywhere on Earth. The model was trained to identify relationships between more than 1.5 million hours of ambient sound level measurements and environmental variables such as the population density, land cover, and climate. These environmental variables are used to predict the sound levels produced by humans, animals, water, and weather at locations where no measurements were taken. BRRC applied the machine learning model to create the first-ever global map of the median ambient sound level. Learn more… https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797930140-WP2N5YOUE2P8EEL0GIB0/Overall_Annual_L50_dBA_Day_ColorbarSouth.png Noise Models Job Collection - Ambient Soundscape Model BRRC developed a machine learning model to predict the average ambient sound level anywhere on Earth. The model was trained to identify relationships between more than 1.5 million hours of ambient sound level measurements and environmental variables such as the population density, land cover, and climate. These environmental variables are used to predict the sound levels produced by humans, animals, water, and weather at locations where no measurements were taken. BRRC applied the machine learning model to create the first-ever global map of the median ambient sound level. Learn more… https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1628114587538-1VHZWFN5GOG5LOLVZ03G/Contours.jpg Noise Models Job Collection - BRRC’s Rocket Noise Model - RUMBLE BRRC’s Rocket Noise Simulation Model, RUMBLE, was selected for ACRP Project 02-66. RUMBLE provides an efficient noise prediction model that produces accurate output relevant to environmental analysis of commercial space operations and airport/space launch site facilities. The RUMBLE modeling methodology reflects the best available science and practices, and has been reviewed and accepted by FAA AEE for use in commercial space studies. The model’s input parameters and user interface were specifically designed to maintain a level of consistency with the AEDT modeling platform to ensure smooth future integration. The user manual and example cases highlight the model’s features and provide potential users with a better understanding of the model’s operation and capabilities. Learn more about RUMBLE. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1628114770578-HYAL7C7M04VOXH9NXKGD/BRRC_Optimizer_1.jpg Noise Models Job Collection - Flight Trajectory Optimizer BRRC has developed a flight trajectory optimization system that will provide the DoD with a tool to better balance the needs of reducing community noise impacts while maximizing the ability and effectiveness of training operations. Our optimization system provides the most cost effective near-term solution for jet noise reduction that can be applied to any military aircraft at any airfield for relatively small incremental costs. In addition, BRRC is developing advanced acoustic propagation and detection algorithms for use with Unmanned Aircraft Systems. Learn more... https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1628114297895-18O8UT102XEVT9JU2NEW/AirGunnery_2.jpg Noise Models Job Collection - Air Weaponry Noise Model BRRC developed a new environmental noise model, entitled NoiseRunner, for DoD air weaponry operations. The project objectives were to (1) characterize the noise generated by airborne weapon systems, (2) evaluate and refine current weapon-noise propagation algorithms for airborne platforms, and (3) incorporate these refined algorithms and additional data requirements into a new noise model simulation. NoiseRunner enables a new set of operational scenarios to be modeled, assisting in public understanding of potential noise impacts and their mitigation. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456804996811-5WTJK41ETY2ZF854TGYT/image-asset.jpeg Noise Models Job Collection - NPS “Upgrades to NMSim Software” BRRC has upgraded the current version of the National Park Service’s noise simulation model NMSim to include the Nord2000 propagation algorithm, and to allow for more advanced data input. Nord2000 is an advanced ray-tracing noise model that includes refraction by the atmosphere and diffraction around terrain. Other advancements include better importation of terrain data, and the ability to import vehicle trajectory files from external sources, such as shapefiles. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607981794403-U3HF9ZU7HFFVJCAH69OS/BRRC_Logo_2012.jpg Noise Models Job Collection - MRNMAP Noise Model Improvements BRRC updated the US Air Force’s Military Operating Area and Route NoiseMap model (MRNMap). These updates included the aligning the reference noise database with NoiseMap, the expansion of the calculations of area operations, and the addition of more supplemental metrics. Advances in computing power have made such improvements possible, and MRNMap is now equipped with a more robust calculation engine, which has the capacity to produce more accurate results. https://www.blueridgeresearch.com/eaeis-image-collection daily 0.75 2021-12-01 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456288408795-CXSDAYS1YZCN8J4TJVTT/image-asset.jpeg NEPA Job Collection - Sonic Boom Impact Analysis at Fort Jefferson BRRC analyzed the potential for damage from sonic boom impacts to Fort Jefferson at Dry Tortuga National Park. Sonic booms are generated by normal training activities within the Key West Range Complex. The assessment involved modeling the current range of sonic booms impacting the area from training operations, measuring the structural response of Fort Jefferson (in coordination with Applied Physical Sciences), and evaluating operational variations that may help to reduce the sonic boom impacts. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456288408795-CXSDAYS1YZCN8J4TJVTT/image-asset.jpeg NEPA Job Collection - Sonic Boom Impact Analysis at Fort Jefferson BRRC analyzed the potential for damage from sonic boom impacts to Fort Jefferson at Dry Tortuga National Park. Sonic booms are generated by normal training activities within the Key West Range Complex. The assessment involved modeling the current range of sonic booms impacting the area from training operations, measuring the structural response of Fort Jefferson (in coordination with Applied Physical Sciences), and evaluating operational variations that may help to reduce the sonic boom impacts. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636945304971-L7HHIDEEQ3XYBIH0AV1W/image.jpg NEPA Job Collection - OLF Noise Simulation BRRC provided noise measurement and modeling to support efforts on the EIS for the construction and operation of an Outlying Landing Field on the US East Coast. BRRC characterized ambient soundscapes, developed DNL contours and conducted supplemental noise modeling for each proposed site, developed NMSim presentations for internal and public demonstrations, and documented the noise modeling methods and results in a technical noise report. BRRC also assisted in writing the Draft and Final EIS, and participated in public meetings. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456247523252-L7TPP1PM49LXDI5XH3E3/WallopsPEIS_1.jpg NEPA Job Collection - NASA Wallops Flight Facility Site Wide Programmatic EIS BRRC completed an analysis of the noise from firings of various rocket systems at the Wallops Flight Facility (WFF). This analysis included long-term soundscape monitoring, a traffic noise study, and an assessment of the noise generated from rocket launches. BRRC’s analysis evaluated the potential impacts from rocket launches and demonstrated the contributions of traffic, weather, insects, and human activity on the existing soundscape. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1608037777434-MYRAIEKC8U595GGEPOPS/image.jpg NEPA Job Collection - Outlying Landing Field EIS, US East Coast BRRC provided noise measurement and modeling to support efforts on the EIS for the construction and operation of an Outlying Landing Field on the US East Coast. BRRC characterized ambient soundscapes, developed DNL contours and conducted supplemental noise modeling for each proposed site, developed NMSim presentations for internal and public demonstrations, and documented the noise modeling methods and results in a technical noise report. BRRC also assisted in writing the Draft and Final EIS, and participated in public meetings https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607984911279-Z372XQO8XZIXPAUIWBN4/E-2D_Advanced_Hawkeye_1.jpg NEPA Job Collection - EA for the Transition of E-2C Hawkeye to E-2D Advanced Hawkeye BRRC conducted noise modeling for the transition of the E-2C Hawkeye to the E-2D Advanced Hawkeye at Naval Station Norfolk, VA (Chambers Field) and Naval Base Ventura County, CA (Pt. Mugu). BRRC reviewed and verified the operational data, and documented the noise impact analysis of these proposed E-2D operations in a technical report. In addition, BRRC assisted in the development of the acoustical sections of the Environmental Assessment (EA). https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607980507316-EVUK24VE2FA3IDP9EL2O/WhiteElkMOA_1.jpg NEPA Job Collection - EIS for Proposed White Elk MOA Extension and Supersonic Airspace BRRC conducted noise and sonic boom modeling for proposed flight training operations in the proposed extension of White Elk Military Operating Area (MOA) in UT and NV. This analysis involved a review and verification of the operational data for the current and proposed training operations. BRRC documented the analysis in a technical note and assisted in the writing of the noise and sonic boom impact section of the Environmental Impact Statement (EIS). https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456367069356-UI3ZBBMUN3NIRRZY0ASM/OLF_1.png NEPA Job Collection - F/A-18 E/F OLF Outlying Landing Field EIS, US East Coast BRRC provided noise measurement and modeling to support efforts on the EIS for the construction and operation of an Outlying Landing Field on the US East Coast. BRRC characterized ambient soundscapes, developed DNL contours and conducted supplemental noise modeling for each proposed site, developed NMSim presentations for internal and public demonstrations, and documented the noise modeling methods and results in a technical noise report. BRRC also assisted in writing the Draft and Final EIS, and participated in public meetings https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1457148500640-M99BCGBFW9WR1IZC1S2M/PTC_1.jpg NEPA Job Collection - USAF Air Educational and Training Command F-35A Pilot Training Center EIS BRRC analyzed existing and projected noise from USAF operations at Luke AFB and Holloman AFB, and Air National Guard operations at the Boise and Tucson Airports. Projected noise operations were focused on the addition of F-35A training squadrons. Noise modeling tasks included developing DNL contours for both airfield and training airspace as well as visual presentations for public demonstrations. These results were utilized to assess the potential noise impacts for the introduction of the F-35A aircraft at these selected airfields and their supporting ranges. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1457149766757-H68KGUF6M15NJ1QQ13DF/Townsend_Bombing_Range_1jpg.jpg NEPA Job Collection - Descriptions for SUAs & MTRs at Townsend Bombing Range BRRC developed operational descriptions for Special Use Airspace (SUA) and Military Training Routes (MTR) above and surrounding TBR, and BRRC analyzed aircraft and aerial weaponry noise for a range of potential operational scenarios. This analysis supported the Environmental Impact Statement (EIS) for the proposed modernization and expansion of TBR. The aircraft noise modeled included operations within the entire Coastal MOA complex that surrounds TBR. https://www.blueridgeresearch.com/mission-planning-image-collection daily 0.75 2024-03-14 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797930140-WP2N5YOUE2P8EEL0GIB0/A010-001_G001-003_Conus_ENS0009_L50-A-AvgMonth-AvgDay-Daytime.png Mission Planning Job Collection - Ambient Soundscape Model BRRC developed a machine learning model to predict the average ambient sound level anywhere on Earth. The model was trained to identify relationships between more than 1.5 million hours of ambient sound level measurements and environmental variables such as the population density, land cover, and climate. These environmental variables are used to predict the sound levels produced by humans, animals, water, and weather at locations where no measurements were taken. BRRC applied the machine learning model to create the first-ever global map of the median ambient sound level. Learn more… https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797930140-WP2N5YOUE2P8EEL0GIB0/A010-001_G001-003_Conus_ENS0009_L50-A-AvgMonth-AvgDay-Daytime.png Mission Planning Job Collection - Ambient Soundscape Model BRRC developed a machine learning model to predict the average ambient sound level anywhere on Earth. The model was trained to identify relationships between more than 1.5 million hours of ambient sound level measurements and environmental variables such as the population density, land cover, and climate. These environmental variables are used to predict the sound levels produced by humans, animals, water, and weather at locations where no measurements were taken. BRRC applied the machine learning model to create the first-ever global map of the median ambient sound level. Learn more… https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607983483596-JAM3LYVYD33FFMXVIDHN/ACOUSTIC_MISSION_PLANNING_1.jpg Mission Planning Job Collection - Acoustic Mission Planning Tool BRRC developed Cursor-on-Target Flight Path Guidance as a near real-time mission planning tool for maximum “show-of-force” effect through exploitation of the focus of sonic booms for the B-1B aircraft. Current military scenarios call for show-of-force operations, and this tool increases the effectiveness of focused sonic boom operations by providing flight path guidance to the pilot. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607983421727-LSRF7YWOIJGGAP8XRMUK/Optimizer_Sreen_Shot.jpg Mission Planning Job Collection - Noise Reduction Optimizer for Military Airfields & Surrounding Areas BRRC has developed a prototype flight profile optimization system that will provide the DoD with a tool to better balance the needs of reducing community noise impacts while maximizing the ability and effectiveness of training operations. Our optimization system provides the most cost effective near-term solution for jet noise reduction that can be applied to any military aircraft at any airfield for relatively small incremental costs. In addition, BRRC is developing advanced acoustic propagation and detection algorithms for use with Unmanned Aircraft Systems. Learn more... https://www.blueridgeresearch.com/aicuz-image-collection daily 0.75 2021-01-05 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456464146729-OQ6UI3SYLPCM2Z5YYJ67/McGuire_AFB_1.jpg AICUZ Job Collection - AICUZ Study for Joint Base McGuire Dix Lakehurst BRRC provided acoustical consulting, data collection, and noise analysis to support the Air Installation Compatible Use Zone (AICUZ) Study for JBMDL. Data collection consisted of onsite personnel interviews, measurements of unique noise generators, and weather station measurements, all collected under time-sensitive conditions. A wide range of base activities were analyzed and modeled, including aircraft operations at the two airfields, weapons training at the ranges, and unique jet sled tests. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456464146729-OQ6UI3SYLPCM2Z5YYJ67/McGuire_AFB_1.jpg AICUZ Job Collection - AICUZ Study for Joint Base McGuire Dix Lakehurst BRRC provided acoustical consulting, data collection, and noise analysis to support the Air Installation Compatible Use Zone (AICUZ) Study for JBMDL. Data collection consisted of onsite personnel interviews, measurements of unique noise generators, and weather station measurements, all collected under time-sensitive conditions. A wide range of base activities were analyzed and modeled, including aircraft operations at the two airfields, weapons training at the ranges, and unique jet sled tests. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456635929885-DAICH5X5E6H7FIEY3ANG/image-asset.jpeg AICUZ Job Collection - Camp Lejeune RCUZ and Camp Davis AICUZ Study BRRC conducted a noise analysis using a range of DoD environmental noise models to identify potential noise impacts to local communities and to guide land use recommendations in the vicinity of USMC ranges. Camp Lejeune training facilities consist of 11 miles of beach, 32 gun positions, 48 tactical landing zones, and 80 live fire ranges, among much else. Correspondingly, this analysis encompassed noise generated by a vast array of large weapons and small arms range expenditures, as well as the associated projectile bow shock from supersonic projectiles. In addition BRRC developed noise contours for rotorcraft training operations conducted at Camp Davis. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456289466312-LTJ88O1YXK0A7NVUHZD1/Kingsville_1.jpg AICUZ Job Collection - AICUZ and RAICUZ Studies for NAS Kingsville BRRC developed noise contours to support an update to the AICUZ for Naval Air Station (NAS) Kingsville, TX and Naval Auxiliary Landing Field (NALF) Orange Grove, TX. To accomplished this task, BRRC gathered and validated operational data for input into noise models. In addition, BRRC performed iterations of the operational parameters to provide input into possible noise reductions through flight track and flight profile modifications. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456287825235-0KXULN0SX6U7RG25BVTE/image-asset.jpeg AICUZ Job Collection - Parris Island Noise Study BRRC conducted a noise study for Marine training operations at the Marine Corps Training Depot Parris Island, SC. The primary noise generating activities on Parris Island include firing ranges and Crucible training operations. Noise modeling included small arms weapon firing, artillery simulators, simulated machine guns and loud speakers. Noise contours from these operations were generated using the SARNAM and BNoise range noise models. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456462815105-Y9K51NHCWP216X41DAE9/Gulfport_1.jpg AICUZ Job Collection - RCUZ Study for NCBC Gulfport As part of a Range Compatible Use Zone project at the Naval Construction Battalion Center (NCBC) Gulfport, BRRC met with Navy personnel to discuss the current and projected training operations at (NCBC) Gulfport and associated areas. From these meetings BRRC developed operational descriptions of noise events within the NCBC Gulfport and completed noise analysis using standard DoD noise models. Noise contour and buffer zone results were documented in a detailed noise study report. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456638123894-LSER1TR5YX0T60MDUSSH/image-asset.jpeg AICUZ Job Collection - RAICUZ Noise Study for Navy Dare and Stumpy Point Ranges BRRC conducted a noise study to determine, define, and evaluate the noise environment from the current and projected aircraft training operations conducted at Dare County Bombing Range and Stumpy Point Range, as part of a Range Air Installation Compatible Use Zone (RAICUZ) study. Aircraft and aerial weaponry noise were modeled for wide range of aerial training missions for both the Navy and Air Force. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456636943987-XDE5RERHHBMERLRSX18L/image-asset.jpeg AICUZ Job Collection - NAS Whiting Field and 13 OLFs AICUZ Study BRRC performed noise analysis and modeling for NAS Whiting Field and seven of its outlying airfields as part of an update to its Air Installation Compatible Use Zone (AICUZ) study. The analysis covered both fixed-wing and rotary-wing aircraft using NoiseMap and Rotorcraft Noise Model (RNM), and included NMSim videos of typical flight operations. This project is a prime example of helicopters playing a crucial role in a noise study, demonstrating BRRC’s experience and understanding of the issues associated with helicopters in an environmental noise analysis. https://www.blueridgeresearch.com/civil-aviation-image-collection daily 0.75 2024-03-26 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1711486567207-OQHWIOWRJGCV01UE47UK/X-59.jpg Civil Aviation Job Collection - X-59 Community Response Testing BRRC is a key member of the contractor team supporting community response tests as part of NASA’s Quesst mission. NASA is working with Lockheed Martin Skunk Works to design and build the X-59 research aircraft, which will demonstrate technology that reduces the loudness of sonic booms to a gentle thump. NASA will fly the X-59 over selected communities around the United States to evaluate community responses to low sonic booms. BRRC will support NASA during these community response tests as part of a contractor team led by HMMH. BRRC’s roles on the team are to plan the flight path of the X-59 to deliver the desired sonic boom metric, to predict and measure sonic boom metrics across each overflown community, and to estimate the sonic boom metric received by each participant in the community response survey. These results will enable NASA and other members of the contractor team to determine the dose-response relationship between the sonic boom metrics and the community response. Ultimately, these results may enable supersonic flight over land. Currently, BRRC is working with NASA and other members of the HMMH-led contractor team in the planning stage for the community response tests. BRRC has developed novel algorithms to detect and classify low sonic booms in the presence of ambient noise (link) and to combine measured and predicted sonic boom metrics using a Kalman filter (link). Photo credit: NASA https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1711486567207-OQHWIOWRJGCV01UE47UK/X-59.jpg Civil Aviation Job Collection - X-59 Community Response Testing BRRC is a key member of the contractor team supporting community response tests as part of NASA’s Quesst mission. NASA is working with Lockheed Martin Skunk Works to design and build the X-59 research aircraft, which will demonstrate technology that reduces the loudness of sonic booms to a gentle thump. NASA will fly the X-59 over selected communities around the United States to evaluate community responses to low sonic booms. BRRC will support NASA during these community response tests as part of a contractor team led by HMMH. BRRC’s roles on the team are to plan the flight path of the X-59 to deliver the desired sonic boom metric, to predict and measure sonic boom metrics across each overflown community, and to estimate the sonic boom metric received by each participant in the community response survey. These results will enable NASA and other members of the contractor team to determine the dose-response relationship between the sonic boom metrics and the community response. Ultimately, these results may enable supersonic flight over land. Currently, BRRC is working with NASA and other members of the HMMH-led contractor team in the planning stage for the community response tests. BRRC has developed novel algorithms to detect and classify low sonic booms in the presence of ambient noise (link) and to combine measured and predicted sonic boom metrics using a Kalman filter (link). Photo credit: NASA https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710203218381-MJJO0N48HE7N8KHJ8L9U/ACRP.png Civil Aviation Job Collection - ACRP 10-29: Aircraft Jet Blast Estimation Tool BRRC is developing a jet blast estimation tool for airport operators to predict the jet blast velocities and temperatures produced by commercial and military aircraft. This research effort involves reviewing the literature for prior work on jet blast, developing and validating a computational model to predict jet blast, and implementing the model as a user-friendly software tool for airport operators. BRRC is performing high-fidelity CFD simulations of jet exhaust plumes and analyzing the salient physics from the simulations to develop the computational model. To validate the computational model, BRRC is deploying sensors to measure jet blast velocities and temperatures produced by commercial aircraft at airports. Finally, BRRC is implementing the computational model as a user-friendly software tool for airport operators to predict jet blast from commercial and military aircraft based on local conditions. Ultimately, the results of this project will enhance safety for airport personnel near jet aircraft. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1711488097562-14KKUIH0N3O8PRNVDGZ4/Lift+Hexa+attrib+USAF+Samuel+King+Jr.jpg Civil Aviation Job Collection - Noise Source Data Development for LIFT’s HEXA Aircraft BRRC was selected by the Agility Prime Program to inspect, process, and analyze the noise data collected from the April 2022 measurements of LIFT’s HEXA aircraft. Four microphones perpendicular to the flight path recorded continuously to capture the noise from three HEXA flyovers for two different payloads. BRRC identified and extracted the ascent, level fly-by, and descent portions of each flyover from each microphone recording using the vehicle’s tracking data. These events were then reviewed for quality and saved using a standard format (ANSI S12.75) which includes pertinent test and equipment information within an ASCII header. For each test condition, event, and microphone, BRRC computed the spectral time history as well as the average sound exposure level (SEL) and average A-weighted maximum sound level (LA,max). These data were delivered in a readable text file format that included the relevant test information. The results of BRRC’s review and analysis were summarized in a slide deck which was presented and delivered to the client. Photo Credit: Samuel King Jr, U.S. Air Force. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607983631595-89Y7UMD53SD5L8XLH2TD/Boeing_Field_3.jpg Civil Aviation Job Collection - Airport Planning Services for King County International Airport BRRC provided King County International Airport (KCIA) with advanced acoustic modeling for a proposed Laterally Displaced Approach (LDA). The analysis demonstrated the impact of over-water noise propagation on the proposed approach vectors. BRRC utilized the military noise model NoiseMap for this analysis, importing the flight operations from KCIA’s 2004 Part 150 study. Photo Credit: redlegsfan21 from Vandalia, OH https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607983551222-V3WXC6D35ZY2FU88D0AI/DNL_Baseline.png Civil Aviation Job Collection - Midland International Airport EA BRRC developed noise contours to evaluate impacts due to the Proposed Actions to operate the Lynx, XCOR’s commercial reusable launch vehicle, from Midland International Airport (MAF). The No Action Alternative noise contours were developed using a combination of FAA’s aviation noise model for civil aircraft and DoD’s NoiseMap program for military aircraft. The Lynx rocket sonic boom and noise modeling were performed using PCBoom and BRRC’s Launch Vehicle Acoustic Simulation Model (RUMBLE). https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456291121918-S1BW3OLSOXOLUHABI126/Boeing_Field_3.jpg Civil Aviation Job Collection - BOEING FIELD Airport Planning Services for King County International Airport, WA Project Description: BRRC provided King County International Airport (KCIA) with advanced acoustic modeling for a proposed Laterally Displaced Approach (LDA). The analysis demonstrated the impact of over-water noise propagation on the proposed approach vectors. BRRC utilized the military noise model NoiseMap for this analysis, importing the flight operations from KCIA’s 2004 Part 150 study.   https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638386211437-4820XCUDF1I5ZGQO1K62/Oak_Ridge_2.jpg Civil Aviation Job Collection - Oak Ridge General Aviation Airport The US Department of Energy is proposing to create a new general aviation airport in Oak Ridge, TN as a reliever airport for the Knoxville area’s McGhee Tyson Airport. As part of this project BRRC collected ambient noise data at three locations around the proposed Oak Ridge General Aviation Airport. In addition, BRRC used estimated operational tempos for this proposed airport to develop Day Night Level (DNL) noise contours. https://www.blueridgeresearch.com/warning-systems-image-collection daily 0.75 2024-03-12 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456803711635-3FK4AJ083STYWL010TYQ/image-asset.jpeg Warning Systems Job Collection - VCU Urban Siren Assessment BRRC created siren coverage maps for the Virginia Commonwealth University using the commercial acoustic modeling software SoundPLAN. This project required developing a three-dimensional model of downtown Richmond, VA, which included all major buildings near VCU (over 750 in total), and modeling of multiple siren configurations. The resultant calculations aided VCU’s assessment of appropriate siren coverage for their campus. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456803711635-3FK4AJ083STYWL010TYQ/image-asset.jpeg Warning Systems Job Collection - VCU Urban Siren Assessment BRRC created siren coverage maps for the Virginia Commonwealth University using the commercial acoustic modeling software SoundPLAN. This project required developing a three-dimensional model of downtown Richmond, VA, which included all major buildings near VCU (over 750 in total), and modeling of multiple siren configurations. The resultant calculations aided VCU’s assessment of appropriate siren coverage for their campus. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456076356352-0QG781QNAZ3W1OJO6VTU/IP_1.jpg Warning Systems Job Collection - Indian Point Energy Center Siren System Far-field Acoustic Test BRRC conducted acoustical tests on the new siren system at the Indian Point Entergy Center. In the first project phase, BRRC sampled the full-system signals (from over 150 sirens) at nine locations throughout the Emergency Planning Zone. The second phase involved measuring the sound output of three individual sirens using ANSI standard methodology. The resultant acoustical data were provided to the Entergy Corporation as part of their verification that the new sirens met the manufacturer's specifications. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638386459245-HF5EZFKB2ONEICSGIOAQ/Siren_Graph.jpg Warning Systems Job Collection - Susquehanna Steam Electric Station Siren Measurements BRRC conducted sound level measurements of eight individual sirens from the Susquehanna Steam Electric Station, using ANSI S12.14 methods. Each siren was tested with an array of five vertical microphones via a bucket truck. Pennsylvania Power and Light (PPL) used these acoustical data for their verification of the new siren system design and operation. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456292217167-ULGECP2T7UHXVNK86XEO/Vermont_Yankee_1.jpg Warning Systems Job Collection - Vermont Yankee Public Alert System The Entergy Corporation has added a number of sirens around the Vermont Yankee Nuclear Power Plant in an effort to improve the quality of their Public Alert system. The first project phase involved measurements from up to two miles from the nearest sirens. In the second phase, BRRC conducted ANSI S12.14 tests via bucket truck on three of the new sirens. https://www.blueridgeresearch.com/measurement-image-collection daily 0.75 2025-03-27 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456069104017-V28O8XAFU6OYSTHRHD4F/NAH_Measurement_Array_1.jpg Measurement System Job Collection - Jet Noise Near-field Acoustic Holography Measurement System BRRC, in partnership with BYU, developed innovative measurement and analysis methods using Near-field Acoustic Holography (NAH) to provide high-quality acoustic data and characterization of the jet-noise source region. The design includes a 150-channel NAH measurement array and data acquisition system, and a state-of-the-art holography processing capability. The prototype system was deployed to perform jet source-noise measurements from an F-22 at Holloman AFB in New Mexico. The culmination of this effort resulted in the ability to show how the scan-based measurements along one plane can be processed using NAH to produce a three-dimensional holographic representation of the sound radiation. This is the first time such a map has been obtained for a full-scale military jet aircraft. Learn more... https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456069104017-V28O8XAFU6OYSTHRHD4F/NAH_Measurement_Array_1.jpg Measurement System Job Collection - Jet Noise Near-field Acoustic Holography Measurement System BRRC, in partnership with BYU, developed innovative measurement and analysis methods using Near-field Acoustic Holography (NAH) to provide high-quality acoustic data and characterization of the jet-noise source region. The design includes a 150-channel NAH measurement array and data acquisition system, and a state-of-the-art holography processing capability. The prototype system was deployed to perform jet source-noise measurements from an F-22 at Holloman AFB in New Mexico. The culmination of this effort resulted in the ability to show how the scan-based measurements along one plane can be processed using NAH to produce a three-dimensional holographic representation of the sound radiation. This is the first time such a map has been obtained for a full-scale military jet aircraft. Learn more... https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456068012960-JQNFW2FB6CWJGAITM2FC/DNL_Baseline.png Measurement System Job Collection https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1743093523787-N3L5PN6GMD9JYWACR8DF/Road+Noise+Array+with+Yellow+Truck.jpg Measurement System Job Collection - Traffic Noise Fleet Database Measurements and Source Identification BRRC collaborated with Cross-Spectrum Acoustics (CSA) to review the Reference Energy Mean Emission Level (REMEL) traffic noise database used in federally-funded highway traffic noise predictions. As part of this effort, BRRC created a custom, portable phased array to measure and identify the source locations and sound levels of passing vehicles. BRRC also developed specialized software for measuring and analyzing the position and speed of vehicles, capturing images, and recording data using the acoustic phased array. This data was then processed through moving source beamforming and deconvolution software to pinpoint the locations and sound levels of the sources. The results will contribute to understanding the vertical noise distribution of different vehicle classes, which will be used in current and future traffic noise models. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456069104035-X3EWX5E5JSAT31LRQW27/ARC_1.jpg Measurement System Job Collection - The Aeroacoustic Research Complex BRRC supported the design and development of the Aeroacoustic Research Complex (ARC) acoustic measurement system. The ARC facility provides improved characterization of in-flight noise directivity by providing synchronized three-dimensional magnitude and spectral acoustical signatures from 56+ microphones. BRRC designed the state-of-the-art custom multichannel acoustic measurement systems and sensor hardware architecture, and collaborated on construction logistics and measurement protocol development. Image Credit: US Air Force https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456069104825-TO43G1V74XVUGD6CBL9S/NASA_Rocket_Measurment_2.jpg Measurement System Job Collection - Energy-Based Acoustic Measurement System for Rocket Noise BRRC, in partnership with Brigham Young University, has developed advanced acoustic measurement, analysis, and modeling techniques for launch load predictions. Multiple full-scale static test fires have been performed at ATK Space Systems Test Services in Promontory, UT. This collected data was used to evaluate the measurement system and compare the performance of multiple probe prototype designs, evaluate historical rocket noise prediction methods, and to guide the development of future launch noise prediction models. Image Credit: Alliant Techsystems https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638385956786-505ECVOUMJTIQNUHPZXU/Fort_Stewart_1.jpg Measurement System Job Collection - Fort Stewart and Hunter Army Airfield Supplemental EA BRRC personnel visited Fort Stewart to assess their current noise monitoring program. This assessment included a review of the current noise environment for range explosions, an examination of their noise monitoring equipment, and acquisition of acoustical data to verify the proper operation of the monitors. BRRC’s assessment provided options for system-wide improvements and helped develop a suitable noise-monitoring program. This assessment included maintenance schedules appropriate for the current equipment and recommendations on improved noise data processing. https://www.blueridgeresearch.com/space-transportation-image-collection daily 0.75 2025-09-08 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1709943576246-7CZFG2IQ62GQWSUESNJX/image-asset.jpeg Space Transportation Job Collection - FAA Rocket Noise Measurements, Modeling/Validation, and Guidance The Federal Aviation Administration (FAA) Office of Commercial Space Transportation (AST) funded BRRC to conduct rocket noise measurements, modeling, validation, and guidance to support their license review process. Under this effort, BRRC has designed, conducted, and documented the measurement of rocket propulsion noise data from six launches, one landing, and two static fire events. The data collected was used to validate the commercial space operations noise model, RUMBLE's ability to accurately predict the noise environment in communities surrounding airports and spaceports. BRRC's RUMBLE is a publicly available software tool designed to model commercial space launch, reentry, and static operations in space and time to compute far-field community noise exposure. In addition to rocket noise measurements and validation, BRRC provided FAA with NEPA related guidance and support. Based on best practices and industry feedback, BRRC developed standalone guidance with recommended commercial space noise modeling requirements, analysis, and impact criteria for NEPA documents. BRRC also provided recommendations for updates to the commercial space noise analysis guidance section of the FAA 1050.1F Desk Reference. Additionally, BRRC developed baseline Community Noise Equivalent Level (CNEL) noise contours for Vandenberg Space Force Base to enable more accurate estimations of cumulative impacts required for NEPA documents. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1709943576246-7CZFG2IQ62GQWSUESNJX/image-asset.jpeg Space Transportation Job Collection - FAA Rocket Noise Measurements, Modeling/Validation, and Guidance The Federal Aviation Administration (FAA) Office of Commercial Space Transportation (AST) funded BRRC to conduct rocket noise measurements, modeling, validation, and guidance to support their license review process. Under this effort, BRRC has designed, conducted, and documented the measurement of rocket propulsion noise data from six launches, one landing, and two static fire events. The data collected was used to validate the commercial space operations noise model, RUMBLE's ability to accurately predict the noise environment in communities surrounding airports and spaceports. BRRC's RUMBLE is a publicly available software tool designed to model commercial space launch, reentry, and static operations in space and time to compute far-field community noise exposure. In addition to rocket noise measurements and validation, BRRC provided FAA with NEPA related guidance and support. Based on best practices and industry feedback, BRRC developed standalone guidance with recommended commercial space noise modeling requirements, analysis, and impact criteria for NEPA documents. BRRC also provided recommendations for updates to the commercial space noise analysis guidance section of the FAA 1050.1F Desk Reference. Additionally, BRRC developed baseline Community Noise Equivalent Level (CNEL) noise contours for Vandenberg Space Force Base to enable more accurate estimations of cumulative impacts required for NEPA documents. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1644269402085-IUKN8G5SHASA1GKRSHW4/image-asset.png Space Transportation Job Collection - Commercial Space Noise and Sonic Boom Measurements BRRC conducted a measurement campaign under ACRP Project 02-81 between November 2017 and April 2019 to collect acoustic, operational, and meteorological data during the launches of the Antares 230, Falcon 9, Delta IV Heavy, and Falcon Heavy vehicles. These events represented a range of mission and operation types, including cargo resupply missions to the International Space Station (OA-8E and CRS-15), a research mission (Parker Solar Probe), a communications satellite launch (Arabsat-6A), and first stage return-to-landing operations (Arabsat-6A). Additionally, the measured launch vehicles possess mass-to-orbit capabilities ranging from medium to super-heavy lift designations. In total, over the four measured events, more than 250 acoustic recordings were collected from 70 sites at distances between 0.2 km and 27 km from the launch and landing pads at two distinct spaceports. The acoustic recordings include propulsion noise measurements from all four launch events as well as sonic boom measurements from the return-to-landing operations. The combined acoustic, operational, and meteorological data were analyzed and compiled into a publicly accessible database with thorough supporting documentation. This well-documented, high-fidelity database will equip future researchers with the information necessary to validate current noise models, identify shortcomings, and improve model accuracy by way of better propulsion noise and sonic boom source characterizations. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638385297628-W25PHV4U4M0PS4S483T2/SpaceTransportation_2.jpg Space Transportation Job Collection - NASA Wallops Flight Facility Site Wide Programmatic EIS BRRC completed a noise study of various rocket systems at the NASA Wallops Flight Facility (WFF). This noise study examined four nominal launch vehicles representing the current baseline conditions, and potential operations, which include the largest orbital vehicles that would be launched from WFF. BRRC’s Launch Vehicle Acoustic Simulation Model (RUMBLE) was used to generate noise contours to assess the noise levels and exposures in the area surrounding WFF. Image Credit: NASA https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456075519350-3M4AQFYYGQJL35JOMK95/NASA_Rocket_Measurment_1.jpg Space Transportation Job Collection - Energy-Based Acoustic Measurement, System for Rocket Noise BRRC, in partnership with Brigham Young University, has developed advanced acoustic measurement, analysis, and modeling techniques for launch load predictions. Multiple full-scale static test fires have been performed at ATK Space Systems Test Services in Promontory, UT. This collected data was used to evaluate the measurement system and compare the performance of multiple probe prototype designs, evaluate historical rocket noise prediction methods, and to guide the development of future launch noise prediction models. Image Credit: Alliant Techsystems https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1485894248323-HPJMV15I03NNH46IN562/Contours.png Space Transportation Job Collection - BRRC’s Rocket Noise Model - RUMBLE BRRC’s Rocket Noise Simulation Model, RUMBLE, was selected for ACRP Project 02-66. RUMBLE provides an efficient noise prediction model that produces accurate output relevant to environmental analysis of commercial space operations and airport/space launch site facilities. The RUMBLE modeling methodology reflects the best available science and practices, and has been reviewed and accepted by FAA AEE for use in commercial space studies. The model’s input parameters and user interface were specifically designed to maintain a level of consistency with the AEDT modeling platform to ensure smooth future integration. The user manual and example cases highlight the model’s features and provide potential users with a better understanding of the model’s operation and capabilities. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1757298624898-6DCB4X32M2O5XW7ZMHV3/MAF_XCOR_Lynx_2.jpg Space Transportation Job Collection - Midland International Airport Launch Site Operator License EA BRRC performed a rocket noise and sonic boom impact study for the Midland International Airport to aid in their application for a Launch Site Operator License. BRRC developed noise contours using BRRC’s Launch Vehicle Acoustic Simulation Model (RUMBLE) to evaluate the noise impact from proposed operations of the Lynx, XCOR’s commercial reusable launch vehicle. In addition to noise, BRRC modeled the potential sonic booms generated by the launch and recovery portions of the Lynx space bound trajectory. Potential impacts were evaluated regarding human annoyance, hearing conservation, and the potential for structural damage. Image Credit: XCOR Aerospace https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456075519270-JMUG3L6F18183VRIQYYU/SpaceTransportation_1.jpg Space Transportation Job Collection - Launch Noise Analysis for SpaceX Launch Site EIS BRRC performed rocket noise analysis to support Space Exploration Technologies Corporation’s (SpaceX) proposal to conduct launches of the Falcon 9 and Falcon Heavy orbital launch vehicles. These vehicles are proposed to be launched from a privately owned launch site in Cameron County, TX. In support of the EIS, advanced acoustic models were used to generate noise contours for assessing the noise levels and exposures in the area surrounding the proposed launch site. Image Credit: SpaceX https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456810666919-USTE1Z64WWY8HD7M002M/image-asset.jpeg Space Transportation Job Collection - SpaceX Dragon McGregor EA BRRC performed noise modeling to support the Environmental Impact Assessment (EA) concerning Space Exploration Technologies Corp. (SpaceX) proposal to operate experimental testing of its DragonFly Reusable Launch Vehicle (RLV) at its test facility in McGregor, TX. BRRC’s Launch Vehicle Acoustic Simulation Model (RUMBLE) was used to generate noise contours for assessing the noise levels and exposures in the area surrounding the proposed launch site. Image Credit: SpaceX https://www.blueridgeresearch.com/source-characterization-image-collection daily 0.75 2025-03-28 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638384928866-5T4B3PIIVGI5C7F3WVSJ/JSF_2013_2.jpg Source Characterization Job Collection - Acoustic Field and Source Measurement Support BRRC conducted F-35A/B ground run-up and flyover tests, including pretest coordination, measurements, analysis, and reporting. This project was performed in support of research by the 711th Human Performance Wing’s Battlespace Acoustics Branch, consistent with the goals of WIRTO TO 27, Acoustic Environments and their Impacts on Humans and Structures. Image Credit: F-35 JPO https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638384928866-5T4B3PIIVGI5C7F3WVSJ/JSF_2013_2.jpg Source Characterization Job Collection - Acoustic Field and Source Measurement Support BRRC conducted F-35A/B ground run-up and flyover tests, including pretest coordination, measurements, analysis, and reporting. This project was performed in support of research by the 711th Human Performance Wing’s Battlespace Acoustics Branch, consistent with the goals of WIRTO TO 27, Acoustic Environments and their Impacts on Humans and Structures. Image Credit: F-35 JPO https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607980704873-AFV1NUGCIQFTW0GQ4KAL/NAH_3.jpg Source Characterization Job Collection - Near-field Acoustic Holography of Military Jet Noise BRRC, in partnership with BYU, developed innovative measurement and analysis methods using Near-field Acoustic Holography (NAH) to provide high-quality acoustic data and characterization of the jet-noise source region. The design includes a 150-channel NAH measurement array and data acquisition system, and a state-of-the-art holography processing capability. The prototype system was deployed to perform jet source-noise measurements from an F-22 at Holloman AFB in New Mexico. The culmination of this effort resulted in the ability to show how the scan-based measurements along one plane can be processed using NAH to produce a three-dimensional holographic representation of the sound radiation. This is the first time such a map has been obtained for a full-scale military jet aircraft. Learn more... https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1644269402085-IUKN8G5SHASA1GKRSHW4/Figure13+-+Example+acoustic+measurement+set-up.png Source Characterization Job Collection - Commercial Space Noise and Sonic Boom Measurements BRRC conducted a measurement campaign under ACRP Project 02-81 between November 2017 and April 2019 to collect acoustic, operational, and meteorological data during the launches of the Antares 230, Falcon 9, Delta IV Heavy, and Falcon Heavy vehicles. These events represented a range of mission and operation types, including cargo resupply missions to the International Space Station (OA-8E and CRS-15), a research mission (Parker Solar Probe), a communications satellite launch (Arabsat-6A), and first stage return-to-landing operations (Arabsat-6A). Additionally, the measured launch vehicles possess mass-to-orbit capabilities ranging from medium to super-heavy lift designations. In total, over the four measured events, more than 250 acoustic recordings were collected from 70 sites at distances between 0.2 km and 27 km from the launch and landing pads at two distinct spaceports. The acoustic recordings include propulsion noise measurements from all four launch events as well as sonic boom measurements from the return-to-landing operations. The combined acoustic, operational, and meteorological data were analyzed and compiled into a publicly accessible database with thorough supporting documentation. This well-documented, high-fidelity database will equip future researchers with the information necessary to validate current noise models, identify shortcomings, and improve model accuracy by way of better propulsion noise and sonic boom source characterizations. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1643129888010-0GK397ZBIYPBFPDNFHI7/DSCF1771.jpg Source Characterization Job Collection - UAS Acoustic Measurements As part of an FAA led team, BRRC conducted noise measurements to characterize the noise emissions from Unmanned Aircraft Systems (UAS) during ground and airborne operations for the purposes of UAS noise analysis in support of 14 CRF Part 135. The team accomplished these measurements at Causey Airport in Liberty, North Carolina. The team performed measurement on three UAS vehicles: Flytrex FTX-M600P, Volansi VOLY C10, and DJI m210. The acoustic array included 20 microphones arraigned for flyovers, vertical take and landings, and hover test conditions. Five of the microphones were elevated above the ground up to 30m. The measurements included 172 flyover passes, 95 vertical operations, and 40 hover events. The measurement team included personnel from the FAA, Volpe, and BRRC. FAA coordinated the UAS and flight operations, Volpe led the vehicle tracking data collection, and BRRC led the acoustic data collection. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710185224357-L8GTKJBUO27PQ472KEHV/image-asset.jpeg Source Characterization Job Collection - Noise Source Data Development for LIFT’s HEXA Aircraft BRRC was selected by the Agility Prime Program to inspect, process, and analyze the noise data collected from the April 2022 measurements of LIFT’s HEXA aircraft. Four microphones perpendicular to the flight path recorded continuously to capture the noise from three HEXA flyovers for two different payloads. BRRC identified and extracted the ascent, level fly-by, and descent portions of each flyover from each microphone recording using the vehicle’s tracking data. These events were then reviewed for quality and saved using a standard format (ANSI S12.75) which includes pertinent test and equipment information within an ASCII header. For each test condition, event, and microphone, BRRC computed the spectral time history as well as the average sound exposure level (SEL) and average A-weighted maximum sound level (LA,max). These data were delivered in a readable text file format that included the relevant test information. The results of BRRC’s review and analysis were summarized in a slide deck which was presented and delivered to the client. Photo Credit: Samuel King Jr, U.S. Air Force. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1743174995209-Y3VFS3GVEKPR9OZG1GMR/Road%2BNoise%2BArray%2BResults.jpg Source Characterization Job Collection - Traffic Noise Fleet Database Measurements and Source Identification BRRC collaborated with Cross-Spectrum Acoustics (CSA) to review the Reference Energy Mean Emission Level (REMEL) traffic noise database used in federally-funded highway traffic noise predictions. As part of this effort, BRRC created a custom, portable phased array to measure and identify the source locations and sound levels of passing vehicles. BRRC also developed specialized software for measuring and analyzing the position and speed of vehicles, capturing images, and recording data using the acoustic phased array. This data was then processed through moving source beamforming and deconvolution software to pinpoint the locations and sound levels of the sources. The results will contribute to understanding the vertical noise distribution of different vehicle classes, which will be used in current and future traffic noise models. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638385066578-15CW06VAWQF8B26NB9I9/CHEVRONS_3.jpg Source Characterization Job Collection - Super Hornet Noise Reduction Research Naval Air Systems Command (NAVAIR) Program Management Activity 265 has developed full scale noise reducing chevrons in efforts to reduce the noise produced by General Electric F414 engines in the F/A 18E/F and EA-18G aircraft. BRRC provided oversight and measurement of NAVAIR’s demonstration and validation tests of these F/A-18E jet nozzle chevrons at Naval Air Engineering Station Lakehurst Jet Blast Deflector facility. BRRC measured noise for single-engine and multi-engine static operations and performed a comparative analysis of the chevron effectiveness. Image Credit: US Navy https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607981115362-UIGJU2F72FZUQ4XWDJM8/LargeWeapons_1.jpg Source Characterization Job Collection - Large Weapon Environmental Noise Characterization BRRC assisted the U.S. Army in developing new measurement procedures for characterizing the environmental noise emitted by large weapon systems. The noise software tools, BNoise and RMTK Noise Tool, that DoD uses to predict and assess impacts of large weapon noise require accurate acoustic source emission models. These models require measurements of pressure waveform, peak level, and 1/3-octave-band sound exposure levels. A free-field representation of the sound source acoustical emission, containing no waveform signal perturbations due to the ground, other reflecting surfaces, or propagation anomalies, is required. This research is needed to ensure installation commanders have the best noise information possible to accomplish training and testing with minimum impact on the civilian communities surrounding installations. Image Credit: CERL https://www.blueridgeresearch.com/industry-image-collection daily 0.75 2021-03-01 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959490769-VKAO7LD7Z5RVN7SHGGIL/Industry2.jpg Industry Job Collection - Occupational & Residential Noise Survey BRRC evaluated the noise exposure level at select locations along an industrial equipment line, as well as noise received in the adjacent residential community attributable to operational activity. BRRC enabled the plant operators to better contextualize residential complaints by understanding ambient vs. operational sound levels relative to local noise ordinances and likely sleep disturbances. BRRC provided mitigation recommendations that focused on redirected pipe apertures, duct silencers, noise masking, and effective public relations. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959490769-VKAO7LD7Z5RVN7SHGGIL/Industry2.jpg Industry Job Collection - Occupational & Residential Noise Survey BRRC evaluated the noise exposure level at select locations along an industrial equipment line, as well as noise received in the adjacent residential community attributable to operational activity. BRRC enabled the plant operators to better contextualize residential complaints by understanding ambient vs. operational sound levels relative to local noise ordinances and likely sleep disturbances. BRRC provided mitigation recommendations that focused on redirected pipe apertures, duct silencers, noise masking, and effective public relations. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959476863-FTV911U4OD1HQHSWT2I9/Industry1.jpg Industry Job Collection - Rock Quarry Noise Mitigation BRRC is characterizing the operational and ambient sound environment in the vicinity of a rock quarry. This collaborative effort between industry and residential interests is focused on objective measurements to inform practical noise mitigation options. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959534935-T9YTKLH4MDXR7H1BLXWI/Industry5.jpg Industry Job Collection - Noise Evaluation of a Planned Blast and Paint Facility BRRC conducted an evaluation of noise-related considerations resulting from a proposed new industrial facility. Using SoundPLAN modeling projections of the external noise sources expected at the facility, BRRC provided context for the potential effects on area community noise. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959505354-I4HYY6EVJOEJSR6NAJYK/Industry3.jpg Industry Job Collection - Noise Measurements of Concrete Plant Operations BRRC served as independent noise specialists to measure and document the sound exposure level attributable to concrete plant operations. BRRC personnel performed regular observations and continuous, multi-day measurements to estimate the ambient and operational acoustic environment at nearby residences and summarized the findings in a comprehensive technical memorandum. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527959547620-F6B0DXNNS65MHTO1O0UC/Industry6.jpg Industry Job Collection - Ambient and Demolition Noise Measurement BRRC conducted noise monitoring to characterize the ambient environment in an office building. Deliverables included a description of the measurement methodology, site descriptions, collected data, and characterization of the monitored noise using statistical acoustical metrics. BRRC prepared this documentation to establish a baseline sound exposure relative to periodic demolition and construction activity. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1527962495673-0J89ZDSHXCR0SFZUVXSU/Industry4.jpg Industry Job Collection - Industrial Noise Study BRRC completed a comprehensive evaluation of a complex industrial environment to determine potential noise mitigation actions. Seasonal soundscape monitoring was performed over eight weeks at ten locations, followed by detailed SoundPLAN modeling. This multi-faceted project required that BRRC personnel characterize the sound output from numerous large equipment items, conduct supportive interactions with the public, and present clear and actionable conclusions. BRRC provided multiple recommendations to achieve effective noise mitigations to help minimize community complaints. https://www.blueridgeresearch.com/team-photos daily 0.75 2026-01-30 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1745880635465-ZEHI9T7BA5M4CS9I1KKJ/Mike.jpg Team Photos Collection - Michael James, M.S.<br>Managing Partner & Chief Engineer Michael James is a principal and founding member of BRRC where he conducts applied research and consulting studies on high-amplitude noise sources and their effects on communities and the environment. He has co-authored over 150 technical papers and reports focusing on the development of innovative measurement, analysis, and modeling techniques to characterize and map the noise emitted from jet and rocket engines/motors. Mr. James has performed over 65 large-scale sound and vibration measurements for military and civilian aviation, rockets, weaponry, and blast noise. Before founding BRRC, he worked at Wyle Laboratories, Inc. Mr. James received his M.S. at Virginia Tech’s Vibration and Acoustic Laboratory where he researched turbofan engine-noise reduction and control technologies for the NASA Langley Acoustics Research Group. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1745880635465-ZEHI9T7BA5M4CS9I1KKJ/Mike.jpg Team Photos Collection - Michael James, M.S.<br>Managing Partner & Chief Engineer Michael James is a principal and founding member of BRRC where he conducts applied research and consulting studies on high-amplitude noise sources and their effects on communities and the environment. He has co-authored over 150 technical papers and reports focusing on the development of innovative measurement, analysis, and modeling techniques to characterize and map the noise emitted from jet and rocket engines/motors. Mr. James has performed over 65 large-scale sound and vibration measurements for military and civilian aviation, rockets, weaponry, and blast noise. Before founding BRRC, he worked at Wyle Laboratories, Inc. Mr. James received his M.S. at Virginia Tech’s Vibration and Acoustic Laboratory where he researched turbofan engine-noise reduction and control technologies for the NASA Langley Acoustics Research Group. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1633719808605-OVW5A96OL0G4JRMN64O7/image-asset.jpeg Team Photos Collection - Micah Downing, Ph.D.<br>President & Chief Scientist Dr. Micah Downing is a principal and founding member of BRRC where his research focuses on aircraft noise and sonic boom modeling, measurement, and assessment of their effects on people and the environment. Dr. Downing held previous positions at the Air Force Research Laboratory and Wyle Laboratories, Inc. Throughout his career, he has directed more than 40 field measurement projects for the USAF, USN, USA, NATO, and NPS. He has also led the acoustical analysis for over 15 major environmental impact studies for the DoD as well as numerous noise studies supporting Environmental Assessments and DOD’s Air Installation and Range Compatible Use Zone studies. Dr. Downing received his B.S. in Physics from Davidson College, his M.S. in Aeronautics from the Joint Institute for the Advancement of Flight Sciences at NASA Langley, and his Ph.D. in Mechanical Engineering from the Georgia Institute of Technology. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607982056263-N6OHBS2VC15LFYDS437N/Josh.jpg Team Photos Collection - Josh Mellon, M.S.<br>CFO & Senior Scientist Josh Mellon joined BRRC in 2010 and is responsible for munitions and aircraft noise modeling, financial management and analysis, and contract formation and negotiation. Projects include jet, siren, and shipyard noise measurements as well as grant acquisition and noise mitigation analysis. Prior to joining BRRC, Mr. Mellon gained three years of management experience at ViewPlus, where he won and managed four grants and developed financial evaluation tools. He also taught undergraduate physics labs for five years, and acquired research experience through internships at NASA, SRI International, and SETI. Mr. Mellon received his B.S. in Physics and his M.S. in Applied Physics with an emphasis in Business from Oregon State University. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1633719903338-PWB5GN0HB3MXPA5HT5R7/image-asset.jpeg Team Photos Collection - Juliet Page, M.S. <br>Principal Engineer Juliet Page is a principal engineer at BRRC conducting and directing research and consulting on transportation noise including sonic boom analysis, measurement, modeling, and dose-response test design and execution. She has led the development of acoustic software including PCBoom and the Advanced Acoustic Model (AAM), formerly the Rotorcraft Noise Model (RNM), which were recently expanded to include 1/12 octave band and time varying loudness metrics to facilitate research of advanced and urban air mobility vehicles. Juliet has led acoustic analysis of helicopter noise abatement procedure development and the creation of several FAA approved helicopter pilot Fly Neighborly training programs in live and perpetual eLearning formats. Ms. Page received her M.S. in Aerospace Engineering focusing on sonic boom modeling from the University of Southern California, a B.S. in Aerospace Engineering from Boston University and has had several years of graduate level rotorcraft acoustics courses from the University of Maryland. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607982732372-4DCXA043H7GHXHDQGUSI/Shane.jpg Team Photos Collection - Shane Lympany, Ph.D.<br>Principal Engineer Dr. Shane Lympany is responsible for a variety of applied research and consulting projects focusing on noise and emissions modeling. He is currently developing models for ambient soundscapes, rocket emissions, long-range acoustic propagation, and cumulative sonic booms. His wide range of experience includes experimental aeroacoustics, high-fidelity fluid dynamics simulations, machine learning, and GIS data analysis. Prior to joining BRRC, Dr. Lympany gained research and development experience at Gulfstream Aerospace Corporation, LORD Corporation, and the Georgia Tech Research Institute. Dr. Lympany received his B.S., M.S., and Ph.D. in Aerospace Engineering from the Georgia Institute of Technology. For his doctoral research, he was awarded a prestigious National Science Foundation Graduate Research Fellowship to investigate the acoustic damping mechanisms of half-wave resonators in a rocket engine environment. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607982106977-OGT6WXRRIWPM35CWW5EP/Alex.jpg Team Photos Collection - Alexandria Salton, M.S.<br>Principal Engineer Alexandria Salton is responsible for applied research and consulting projects focusing on the measurement, analysis, and modeling of jet and rocket noise. Ms. Salton has been instrumental in the research, design, and development of RUMBLE, used to perform propulsion noise and emissions analysis for commercial space environmental studies. She has authored over twenty-five rocket noise environmental studies to evaluate the potential impacts of noise and sonic booms. Ms. Salton’s field experience includes the measurement of the Falcon Heavy, Falcon 9, Delta IV Heavy, and Antares 230 rockets, as well as the F-35 and F/A-18 military jets. She also leads GIS-based processing and analysis efforts to develop in-house graphical tools. Ms. Salton received her B.A. in Mathematics from Bates College and her M.S. in Acoustics from The Pennsylvania State University’s, where she researched the feasibility of measuring the acoustic pressure of a pipe’s internal fluid using externally mounted accelerometers. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607982667173-0SMLLCKTYRYY35DBVKPL/Ben.jpg Team Photos Collection - Ben Manning, M.S. <br>Senior Engineer Ben Manning’s responsibilities encompass a broad range of acoustical consulting services. He supports all facets of civil and military aviation consulting projects, including computer modeling and programming, noise measurements, data analysis, and technical writing. His experience includes military aircraft noise (DoD AICUZ studies), NEPA documentation, airspace noise, civil FAR Part 150 studies, and acoustic research and experimentation. Mr. Manning has expert knowledge of aviation noise models. He has contributed to studies and research programs that assess noise, emissions, fuel burn, and operational impacts to airports and the national airspace system. Mr. Manning received a B.S. in Mechanical Engineering from the Georgia Institute of Technology and a M.S. in Mechanical Engineering from Duke University, where he researched boundary element methods applied to room acoustics. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1607982312438-CYH65A1RY2YUXDFLUPB5/Matt.jpg Team Photos Collection - Matt Calton, M.S. Senior Engineer Matt Calton directs test planning, execution, and analysis for large-scale measurement efforts to obtain high-fidelity acoustic data for source and soundscape characterization. He has conducted measurements to characterize the noise from spacecraft launch/landing operations, installed and uninstalled military jet engines, UAS, and commercial aviation. Mr. Calton develops and uses state-of-the-art acoustic modeling tools for advanced noise analysis. He is instrumental in the development of user-friendly tools to visualize and evaluate the noise impacts of aircraft and spacecraft operations including SELCalc3, Navy Sound Insulation Estimator, and RUMBLE. He has led consulting efforts for a variety of projects including concrete plants, quarries, event centers, and road construction, and served as an expert witness for legal proceedings. Mr. Calton received his M.S. in Physics from Brigham Young University, with an emphasis in Acoustics. His graduate work focused on designing compact, cost-efficient passive noise control elements for operator cabins in heavy construction vehicles. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636664771492-M072VLB88UD6BVFOZ7LX/130906-F-WC395-038.jpg Team Photos Collection - Blaine Harker, Ph.D. <br>Senior Engineer Dr. Blaine Harker has a variety of research and development expertise for array signal processing applications, aeroacoustics, and underwater acoustics. He is currently responsible for jet noise research at BRRC including computational fluid dynamics (CFD) computation, array processing, nonlinear acoustics, measurements, and LabVIEW programming. Prior to joining the BRRC team, he worked as a scientist at the Naval Undersea Warfare Center specializing in array design and signal processing research. Dr. Harker has experience in conventional and adaptive beamforming, holography, and other acoustic inverse problems. He has also contributed to multiple large-scale underwater and aeroacoustic field experiments where hundreds of acoustic measurements were collected and analyzed. Dr. Harker has presented nearly two dozen research conference lectures and co-authored twenty papers and conference proceedings. He received his B.S. and Ph.D. in Physics from Brigham Young University where he specialized in acoustics research. Dr. Harker’s dissertation characterized military aircraft jet noise using wavepacket analysis and other array processing methods. Email | LinkedIn https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689796030075-9YKK9K8ORXQOMX75EUTW/image-asset.jpeg Team Photos Collection - Máté (Matt) Szőke, Ph.D. <br>Senior Engineer Dr. Máté (Matt) Szőke conducts computational fluid dynamics (CFD) simulations, experimental testing, data analysis, and reduced-order modeling on a variety of applied research projects within the field of aeroacoustics, aerodynamics, and acoustics. He has a wide range of experimental experience from conventional to state-of-the-art techniques, such as pressure-based aerodynamic testing, single-point and array-type microphone measurements, and laser-optical investigations (time-resolved particle image velocimetry, shadowgraph). Before joining the BRRC team in 2023, he worked at the Virginia Tech Stability Wind Tunnel as a Senior Research Associate, where he advised both graduate and undergraduate students, managed facility upgrades, performed industrial tests, and conducted fundamental research. Máté received his B.Sc. and first M.Sc. in Mechanical Engineering from Budapest University of Technology and Economics, and his second M.Sc. in CFD from Cranfield University. He obtained his Ph.D. in Aerospace Engineering from Bristol University. Dr. Szőke’s dissertation focused on trailing edge noise reduction using flow control methods. Email | LinkedIn https://www.blueridgeresearch.com/expertise-section-photos daily 0.75 2021-11-13 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626655161037-NYKUXXY7M92GFSVU5INU/Overall_Annual_L50_dBA_Day_ColorbarSouth_v2.jpg Expertise Section Photo Collection - <b>Noise Models</b> Noise models are fundamental to analyzing noise impacts. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626655161037-NYKUXXY7M92GFSVU5INU/Overall_Annual_L50_dBA_Day_ColorbarSouth_v2.jpg Expertise Section Photo Collection - <b>Noise Models</b> Noise models are fundamental to analyzing noise impacts. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636755712-12G36DY0CV3V0M7NINYL/SpaceTransportation_3.jpg Expertise Section Photo Collection - <b>Space Transportation</b> BRRC is at the forefront of research to improve understanding of the noise generated by rocket propulsion systems and in turn, the loads exerted on launch vehicles. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636764585-WFPDXCGW5TV9UXXBWSLX/Slide_02-2.jpg Expertise Section Photo Collection - <b>NEPA-EA/EIS</b> Noise represents one of the most prominent and contentious environmental issues associated with aviation, launch vehicle, and military training operations. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636745035-8LKAZ970H3986O75S6SN/SourceCharacterization_3-3.jpg Expertise Section Photo Collection - <b>Source Characterization</b> BRRC is recognized as a leader in sound source characterization and propagation for DoD, transportation and industrial clients. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636766388900-U3F9JR6IOVYGXQ3NSR6W/MeasurmentSystems_1.jpg Expertise Section Photo Collection - <b>Measurement Systems</b> https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636737274-YD5Y5R9W5H548CKF6RB0/ParrisIsland_1.jpg Expertise Section Photo Collection - <b>AICUZ, RAICUZ, and RCUZ</b> https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626637591414-BBQSSGFMUZ56CRSZCMSK/BRRC_Optimizer_1.jpg Expertise Section Photo Collection - <b>Mission Planning</b> https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636737404-4JBAU3RNE5MWQVSGU7I5/Boeing-Field_1.jpg Expertise Section Photo Collection - <b>Civil Aviation</b> https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626637387552-ZQJ40BRAEXA0EUH9BW7E/Industry.jpg Expertise Section Photo Collection - <b>Industry</b> https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626637461398-3CP5VNR9JXQPJTX9QA73/WarningSystems_2.jpg Expertise Section Photo Collection - <b>Warning Systems</b> https://www.blueridgeresearch.com/careers daily 0.75 2025-04-28 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/71fd48c5-5bd7-4e21-ab85-0e09474d05b1/CareersBRRC.jpg CAREERS https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/c8f51842-b6c1-4cf4-b01c-a68d4fd108da/CareersBRRC.jpg CAREERS https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/cf4581bf-76aa-4798-bbef-75ef8d7e4829/LaunchYourCareerWithBRRC.image.png CAREERS - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.blueridgeresearch.com/contact daily 0.75 2025-04-16 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636760755364-S0E4MDXVYQS88R37W7JB/Asheville_Hogans.jpg CONTACT https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1455420617626-JQ6TGI43ICFQJ45NY38W/Office.jpg CONTACT - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://www.blueridgeresearch.com/about daily 0.75 2025-04-29 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/f9550661-d42c-4943-b83a-a7d09fa9cd33/AboutBRRCItaly+attrib+MMJ.jpg ABOUT https://www.blueridgeresearch.com/home daily 1.0 2025-04-28 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1615606149454-ENCCMVPADJ05A8A9LHX7/Slide_01.edited.jpg HOME https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636760755364-S0E4MDXVYQS88R37W7JB/Asheville_Hogans.jpg HOME https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636943702713-8I4HBK0WGL93VM4K39MX/Delta.iv.heavy.jpg HOME https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/183409d7-af91-4e52-abf9-101026910d33/AboutBRRCItaly+attrib+MMJ.jpg HOME https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/b99f063c-15d8-44e1-b2dc-b9339f02a694/CareersBRRC.jpg HOME https://www.blueridgeresearch.com/expertise daily 0.75 2024-05-03 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1455859872707-SZ7SEYNLG87W3Z321RBF/EA_EIS_NEPA_1.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1455859927933-XH3CC2PMXIR1018A74AI/AICUZ_RAICUZ_RCUZ_1.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1455857985328-I6XMQXKOAXYHNYK3PA9S/MissionPlanning_1.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1528121014447-EF81YOJMKD3R3X70KF9I/Industry+Cover+Image+from+Unsplash+v2.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1457017707694-3N9KAN7V2K0TD2NQV8UI/WarningSystems_2.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1628115537919-ZQCR3E2MYVV11FBTQCQK/SourceCharacterization_3-3.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456205673670-CO6O92JMPDPDVLRZHCK5/SpaceTransportation_3.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636766388900-U3F9JR6IOVYGXQ3NSR6W/MeasurmentSystems_1edited.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636943702713-8I4HBK0WGL93VM4K39MX/Delta.iv.heavy.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1637795882180-MQWM8O3KRAV1ZSFSHCZQ/DSCN2057.jpg EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797645225-GZ212BX2BPBYYYVGQ831/A010-001_G002-003_Global_ENS0010_L50-A-AvgMonth-AvgDay-Daytime.png EXPERTISE https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710206387710-BZBBYP17ZQNH995SE1NE/evtol.uam.uas2.jpg EXPERTISE https://www.blueridgeresearch.com/evtoluasuam-1 daily 0.75 2024-03-26 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710207495566-BR9REG5DRX1J5O0YEEQ3/BriefingChartGraphic2.png eVTOL/UAS/UAM Job Collection - Full-Scale eVTOL Community Noise Measurements and Modeling BRRC has partnered with The Pennsylvania State University to acquire research-quality acoustic measurements and to validate aeroacoustic models of Urban Air Mobility (UAM) vehicles under a NASA-funded Phase II STTR. Our team is currently expanding the capabilities of OpenCOPTER, a computationally efficient, state-of-the-art aeroacoustic model, to better predict rotor-rotor and rotor-airframe interactions. In partnership with Archer Aviation, our team will conduct acoustic measurements of Archer’s full-scale, multirotor UAM aircraft, Midnight. These flight tests will gather research-quality acoustic validation data at flight conditions expected to produce rotor-rotor and rotor-airframe interactions. This research will enable NASA and the Advanced Air Mobility industry to identify vehicle configurations and operations that drive community noise, expand our collective understanding of UAM noise, and accelerate the design cycle of UAM aircraft. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710207495566-BR9REG5DRX1J5O0YEEQ3/BriefingChartGraphic2.png eVTOL/UAS/UAM Job Collection - Full-Scale eVTOL Community Noise Measurements and Modeling BRRC has partnered with The Pennsylvania State University to acquire research-quality acoustic measurements and to validate aeroacoustic models of Urban Air Mobility (UAM) vehicles under a NASA-funded Phase II STTR. Our team is currently expanding the capabilities of OpenCOPTER, a computationally efficient, state-of-the-art aeroacoustic model, to better predict rotor-rotor and rotor-airframe interactions. In partnership with Archer Aviation, our team will conduct acoustic measurements of Archer’s full-scale, multirotor UAM aircraft, Midnight. These flight tests will gather research-quality acoustic validation data at flight conditions expected to produce rotor-rotor and rotor-airframe interactions. This research will enable NASA and the Advanced Air Mobility industry to identify vehicle configurations and operations that drive community noise, expand our collective understanding of UAM noise, and accelerate the design cycle of UAM aircraft. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1711486329699-C05CEM65LIBOKWZWQDEX/A010-001_G001-003_Conus_ENS0009_L50-A-AvgMonth-AvgDay-Daytime.png eVTOL/UAS/UAM Job Collection - Ambient Soundscape Model BRRC developed a machine learning model to predict the average ambient sound level anywhere on Earth. The model was trained to identify relationships between more than 1.5 million hours of ambient sound level measurements and environmental variables such as the population density, land cover, and climate. These environmental variables are used to predict the sound levels produced by humans, animals, water, and weather at locations where no measurements were taken. BRRC applied the machine learning model to create the first-ever global map of the median ambient sound level. Learn more… https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1643129888010-0GK397ZBIYPBFPDNFHI7/drone.close.jpg eVTOL/UAS/UAM Job Collection - UAS Acoustic Measurements As part of an FAA led team, BRRC conducted noise measurements to characterize the noise emissions from Unmanned Aircraft Systems (UAS) during ground and airborne operations for the purposes of UAS noise analysis in support of 14 CRF Part 135. The team accomplished these measurements at Causey Airport in Liberty, North Carolina. The team performed measurement on three UAS vehicles: Flytrex FTX-M600P, Volansi VOLY C10, and DJI m210. The acoustic array included 20 microphones arraigned for flyovers, vertical take and landings, and hover test conditions. Five of the microphones were elevated above the ground up to 30m. The measurements included 172 flyover passes, 95 vertical operations, and 40 hover events. The measurement team included personnel from the FAA, Volpe, and BRRC. FAA coordinated the UAS and flight operations, Volpe led the vehicle tracking data collection, and BRRC led the acoustic data collection. https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1711492925775-F8621DVWZ6PHV0937X13/LiftHexa.jpg eVTOL/UAS/UAM Job Collection - Noise Source Data Development for LIFT’s HEXA Aircraft BRRC was selected by the Agility Prime Program to inspect, process, and analyze the noise data collected from the April 2022 measurements of LIFT’s HEXA aircraft. Four microphones perpendicular to the flight path recorded continuously to capture the noise from three HEXA flyovers for two different payloads. BRRC identified and extracted the ascent, level fly-by, and descent portions of each flyover from each microphone recording using the vehicle’s tracking data. These events were then reviewed for quality and saved using a standard format (ANSI S12.75) which includes pertinent test and equipment information within an ASCII header. For each test condition, event, and microphone, BRRC computed the spectral time history as well as the average sound exposure level (SEL) and average A-weighted maximum sound level (LA,max). These data were delivered in a readable text file format that included the relevant test information. The results of BRRC’s review and analysis were summarized in a slide deck which was presented and delivered to the client. Photo Credit: Samuel King Jr, U.S. Air Force. https://www.blueridgeresearch.com/rumble daily 0.75 2025-04-23 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/e9131c4b-4853-41a3-a8f2-eaf9f1865aec/Rumble-MMJ+attr.jpg RUMBLE https://www.blueridgeresearch.com/privacy-statement daily 0.75 2016-03-10 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1456117479424-9ZGVVXCS60E65AJS2CWV/SourceCharacterization_2.jpg Privacy Policy https://www.blueridgeresearch.com/noise-models daily 0.75 2023-07-19 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1689797645225-GZ212BX2BPBYYYVGQ831/A010-001_G002-003_Global_ENS0010_L50-A-AvgMonth-AvgDay-Daytime.png Noise Models https://www.blueridgeresearch.com/nepa-ea-eis daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626636764585-WFPDXCGW5TV9UXXBWSLX/Slide_02-2.jpg NEPA-EA/EIS https://www.blueridgeresearch.com/space-transportation daily 0.75 2024-03-14 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636132886205-N2LPPGRD74MLFFCBIWAJ/SpaceTransportation_3.jpg Space Transportation https://www.blueridgeresearch.com/civil-aviation daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1638379088689-WFAIC3YIVP3OMH9Z6WD7/DSCN2057.jpg Civil Aviation https://www.blueridgeresearch.com/warning-systems daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636750681779-0RCXLGUZ2FN5Z3DK5XPJ/WarningSystems_2.jpg Warning Systems https://www.blueridgeresearch.com/aicuz-raicuz-and-rcuz daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1455765484043-UYMDM4156XQLCQG430HK/WhiteElkMoa.jpg AICUZ, RAICUZ, and RCUZ https://www.blueridgeresearch.com/mission-planning daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1628114770578-HYAL7C7M04VOXH9NXKGD/BRRC_Optimizer_1.jpg Mission Planning https://www.blueridgeresearch.com/source-characterization daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1634178699420-TPZVNQ4S7S8P3DXTH1RU/SourceCharacterization_3-3.jpg Source Characterization https://www.blueridgeresearch.com/industry daily 0.75 2024-03-14 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1626637387552-ZQJ40BRAEXA0EUH9BW7E/Industry.jpg Industry https://www.blueridgeresearch.com/measurement-systems daily 0.75 2021-11-24 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1636766388900-U3F9JR6IOVYGXQ3NSR6W/MeasurmentSystems_1edited.jpg Measurement Systems https://www.blueridgeresearch.com/evtol-uam-uas daily 0.75 2024-03-26 https://images.squarespace-cdn.com/content/v1/565ba902e4b0b80773a74760/1710206387710-BZBBYP17ZQNH995SE1NE/evtol.uam.uas2.jpg eVTOL/UAS/UAM