TagNoise(196)

This Congressional Research Service report explains how the federal government regulates aircraft noise around U.S. airports, primarily through two FAA programs: a voluntary noise compatibility planning program (Part 150) and a framework governing noise-based access restrictions (Part 161). It also highlights a key policy debate around whether the longstanding DNL 65 decibel threshold for 'significant' noise is still appropriate, given newer FAA survey data suggesting communities are significantly annoyed at much lower noise levels. The report is relevant to ongoing discussions about updating federal aviation noise standards ahead of the expected 2023 FAA reauthorization.

This document consists of an invoice and supporting monthly status report from ABCx2, LLC, a consulting firm, billing Arlington County $59,500 for consulting services performed between April and June 2021. The work, carried out by team members Jim, Jason, and Tim, focused on airplane noise analysis and community engagement efforts related to DCA (Ronald Reagan Washington National Airport), including TAA test data reviews, NOA (Notice of Arrival) presentation preparation, and community working group meetings. The invoice, dated July 12, 2021, was approved for payment on July 29, 2021 by Arlington County's Richard I. Roisman.

This 2021 presentation by aviation consultant Jim Allerdice examines 'dispersion' — the practice of intentionally varying flight paths so that aircraft noise is spread across a wider area rather than repeatedly concentrated over the same neighborhoods. It explores the tension between the FAA's preference for Performance-Based Navigation (PBN/RNAV), which promotes precise, repeatable flight paths for safety and efficiency, and the concerns of communities living under those concentrated flight corridors. The material is relevant to ongoing debates about how airports like Sea-Tac can balance operational efficiency with equitable distribution of aircraft noise impacts.

This 2021 FAA report analyzes the Neighborhood Environmental Survey (NES), a large-scale study examining how aircraft noise affects communities around 20 U.S. commercial airports. Researchers surveyed over 10,000 residents and found that annoyance with aircraft noise increases steadily as noise levels rise, with significantly more people reporting high annoyance than older studies had suggested. The findings provide an updated national curve showing the relationship between measured noise exposure (DNL) and community annoyance, which can inform airport noise policy decisions.

The FAA conducted a large-scale Neighborhood Environmental Survey (NES) of 10,000 people near 20 U.S. airports to measure how aircraft noise affects community annoyance, finding that significantly more people are bothered by noise than older studies suggested — about 66% of respondents were highly annoyed at 65 decibels (DNL) and 20% at 50 decibels. The agency uses the Day-Night Average Sound Level (DNL) metric to measure noise exposure and is reviewing whether its longstanding 65 DNL threshold for 'significant' noise impact should be updated. The FAA is seeking public comment on these research findings before making any changes to official noise policy.