AIRCRAFT SOUND MONITORING:
In compliance with the Fiscal Year 2020 National Defense Authorization Act (NDAA), the United States Department of the Navy (Navy) measured sound levels of jet aircraft at Naval Air Station (NAS) Whidbey Island and NAS Lemoore and compared the resulting measured data with modeled noise data.
This webpage provides more detailed information on the design of the study, results of the monitoring, and data collected and/or produced during the study.
Report to Congress
Department of the Navy Provides Aircraft Sound Monitoring Report to Congress
The technical report provides additional details on the design of the monitoring study; a description of the data collection and analysis procedures; a detailed discussion on the comparison of the measured versus modeled results; and a summary of the conclusions of the study. The report also includes several appendices which provide more information on the basics of sound, the Department of Defense (DoD) aircraft noise models, and the DoD noise study procedures.
Technical Report - Real-time Aircraft Sound Monitoring_FINAL
I. Aircraft Acoustic & Flight Operations Data
The data collected each period included: (1) acoustic recordings by sound level meters deployed at sites around each airfield to capture sound levels during a range of flight operations across a range of seasonal weather conditions; and (2) operations data, including logs of air traffic controllers and the monitoring teams, to document the flight activity scheduled and observed during each monitoring period.
NAS Whidbey Island (NASWI) Acoustic Data
The NASWI acoustic data is organized in eleven separate zip files; one file for each airfield monitoring location. Each file contains data from all four monitoring periods. The ‘READ ME’ file contains a description of the data and instructions on how to access the sound level meter software in order to read the data.
PUBLIC_AcousticData_README NASWI - SLM Serial Number Decoder Ring
NASWI_Site_2B_T.zip NASWI_Site_3A_T A. zip NASWI Site 3A T B NASWI_Site_5B_SG.zip NASWI_Site_8B_SG.zip NASWI_Site_9B_SG.zip
NASWI_Site_20B_SG.zip NASWI_Site_24A_B.zip NASWI_Site_25B_T.zip NASWI_Site_26B_SG.zip
The NASWI training airspace acoustic data is organized in zip files; each zip file contains data organized by the month of the year-long monitoring period at the sound level meter location in the Olympic National Park.
NASWI_Site_99_HOH_2021_01_A.zip NASWI Site 99 HOH 2021 01_B.zip
NASWI_Site_99_HOH_2021_02.zip NASWI_Site_99_HOH_2021_03_A.zip NASWI Site 99 HOH 2021 03_B.zip NASWI_Site_99_HOH_2021_04_A.zip NASWI_Site_99_HOH_2021_04_B.zip
NASWI_Site_99_HOH_2021_05_A.zip NASWI_Site_99_HOH_2021_05_B.zip NASWI_Site_99_HOH_2021_06_A.zip NASWI_Site_99_HOH_2021_06_B.zip NASWI_Site_99_HOH_2021_07_A.zip NASWI_Site_99_HOH_2021_07_B.zip
NASWI_Site_99_HOH_2021_08_A.zip NASWI_Site_99_HOH_2021_08_B.zip NASWI_Site_99_HOH_2021_09_A.zip NASWI_Site_99_HOH_2021_09_B.zip NASWI_Site_99_HOH_2020_11_A.zip NASWI_Site_99_HOH_2020_11_B.zip
NASWI_Site_99_HOH_2020_12_A.zip NASWI_Site_99_HOH_2020_12_B.zip NASWI_Site_99_HOH_2020_10A NASWI_Site_99_HOH_2020_10B
NASWI_Site_99_HOH_2020_10C NASWI_Site_99_HOH_2021_10A1 NASWI_Site_99_HOH_2021_10A2
NASWI_Site_99_HOH_2021_10B1 NASWI_Site_99_HOH_2021_10B2 NASWI_Site_99_HOH_2021_10C1
NAS Whidbey Island (NASWI) Flight Operations Data
The NASWI Ault Field flight operations data is organized in pdf documents, one for each monitoring period; the training airspace flight activity is organized in one pdf document for the year-long monitoring period. The ‘READ ME’ files contain a description of the data fields.
Outlying Land Field (OLF) Coupeville Flight Operations Data
OLF Coupeville flight operations data were collected by direct field observations. The attached zip file includes the daily flight activity during the monitoring study.
NAS Lemoore (NASL) Acoustic Data
The NASL acoustic data is organized in ten separate zip files; one file for each airfield monitoring location. Each file contains data from all four monitoring periods. The ‘READ ME’ file contains a description of the data and instructions on to access the sound level meter software in order to read the data.
PUBLIC_AcousticData_README NASL - SLM Serial Number Decoder Ring
NASL_Site_2_T.zip NASL_Site_21_T.zip NASL_Site_20_B.zip NASL_Site_19_T_GC.zip NASL_Site_9_T.zip
NASL_Site_4_T.zip NASL_Site_3_T.zip NASL_Site_15_T.zip NASL_Site_16_T_LF.zip NASL_Site_6_T_N2.zip
NAS Lemoore (NASL) Flight Operations Data
The NASL flight operations data is organized in pdf documents; one for each monitoring period. The ‘READ ME’ file contains a description of the data fields.
II. Acoustic Observation Data
The acoustic team used observer logs to document the observed details on the acoustic environment around the monitoring sites. These logs were used to help identify non-aircraft sound sources and identify aircraft events recorded by the sound level meters each monitoring period. The data is presented in one zip file for each installation. A ‘READ ME’ file contains a description of the data.
NAS Whidbey Island (NASWI) Acoustic Observer Logs
NAS Lemoore (NASL) Acoustic Observer Logs
III. Aircraft Noise Event Database
The aircraft noise event classification process created an event database. The database is a catalogue of all aircraft noise events, and associated acoustic metrics and flight operation for each event. The database was used to analyze and compare the measured sound level data to modeled data. The noise event data is organized in zip files; one for each airfield. A ‘READ ME’ file contains a brief description of the data fields.
NASWI Noise Event Database
NASL Noise Event Database
IV. Aircraft Noise Measured Results
The aircraft noise measure results are based on the identification process provided above. This database provides the direct calculation of the noise metrics, DNL and CNEL. The noise measured results are organized in zip files; one for each airfield. A ‘READ ME’ file contains a brief description of the data fields.
NASWI Noise Measured Results
OLF_Coupeville_Daily_DNL_A1 OLF_Coupeville_Daily_DNL_A2 OLF_Coupeville_Daily_DNL_B1
NASL Noise Measured Results
V. Noise Modeling Data
The noise modeling data is organized in one zip file. The zip file contains folders for NAS Whidbey Island (NASWI) and NAS Lemoore (NASL). The NASWI folder includes the NOISEMAP and MRNMAP input and outputs. The NASL folder includes NOISEMAP inputs and outputs. A ‘READ ME’file contains a brief description of the noise modeling data.