TagNoise Exposure Update(9)
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Day-Night Average Sound Level Calculation
This diagram explains the DNL (Day-Night Average Sound Level) metric used in airport noise policy, showing a bar chart of hourly LEQ sound levels (in dBA) over a 24-hour period labeled 'One Day of Events (DNL).' It highlights the 10-dB nighttime penalty applied to noise events occurring during nighttime hours, which is a standard FAA methodology for calculating community noise exposure. -
2020-09-15Letter to Ms. Hamer regarding GAO study 103933: Community impacts from NextGen noise
A community member wrote to a GAO researcher studying NextGen aviation noise impacts near Seattle-Tacoma International Airport, urging that community complaints be paired with responses from the FAA and Port of Seattle to ensure credibility. Key concerns raised include an outdated noise exposure map that has not been updated despite significant growth in air traffic, and the FAA's alleged refusal to answer questions submitted as far back as April 2018. The letter argues that without official rebuttals or supporting documentation, community perceptions risk appearing unsubstantiated and could undermine the integrity of the GAO study. -
2017-04-01John f. kennedy international airport final noise exposure map report
A Title 14 CFR Part 150 Final Noise Exposure Map Report for JFK International Airport prepared by Environmental Science Associates and other consulting firms for the Port Authority of New York & New Jersey. The report addresses federal aviation noise regulations and mapping requirements. -
2003-09-01Snohomish County Airport/Paine Field FAR Part 150 noise exposure maps update
This September 2003 report presents an update to the FAR Part 150 Noise Exposure Maps for Snohomish County Airport (Paine Field) near Everett, Washington, prepared by Barnard Dunkelberg & Company. It covers airport inventory, aircraft operations forecasts, and the development of noise contours to map areas affected by aircraft noise. The study was conducted with input from a Study Advisory Committee and involved formal public consultation processes. -
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1981-12-29Policy Advisory Committee meeting date change notice
A December 29, 1981 letter from Port of Seattle Chairman Oris W. Dunham, Jr. notifies Policy Advisory Committee members that their upcoming meeting has been rescheduled from January 13 to January 14, 1982 at 2:00 p.m. in Sea-Tac's auditorium due to a scheduling conflict. The primary focus of the meeting remains the Noise Exposure Update, with additional agenda items also planned for discussion. Members were advised that the final agenda would be mailed during the first week of 1982. -
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Policy Advisory Committee Meeting Notice – Noise Exposure Update
Meeting notice from Sea-Tac International Airport Chairman Oris W. Dunham Jr. to Policy Advisory Committee Members announcing a January 13, 1982 meeting. The primary purpose of the meeting is to discuss the Noise Exposure Update. -
1981-01-13Technical Advisory Committee Meeting – Sea-Tac Exposure Noise Exposure Forecast Update
Memorandum from Port of Seattle Study Staff announcing a Technical Advisory Committee meeting for January 20, 1981 to discuss the Sea-Tac noise exposure forecast update. The agenda includes reviewing the previous meeting, proposed validation program for the Integrated Noise Model (INM), and first run of INM for South Flow Test Day.