TagNoise(258)

The Aviation Environmental Design Tool (AEDT) Version 3g is a Federal Aviation Administration software system used to model aircraft operations and calculate their environmental impacts, including noise, emissions, and fuel consumption. This Quick Start Tutorial guides users through building basic noise and emissions studies, covering steps such as adding airports, creating flight tracks, setting up receptors, and running metric results. The tool is relevant to airport noise policy analysis, as it provides a structured method for quantifying and evaluating the environmental effects of aviation activity around airports like Sea-Tac.

Washington state law defining requirements for port commissions to investigate and monitor aircraft noise impact before initiating abatement programs. Establishes geographic boundaries for “impacted areas” where port districts may undertake noise programs, with specific distance limitations from runway ends and centerlines.

This document explains how aircraft noise is measured using decibel-based metrics such as DNL, CNEL, and SEL, and highlights that the FAA's accepted noise threshold of 65 dB exceeds the World Health Organization's recommended limits of 50–55 dB outdoors and 30–35 dB indoors. It also notes that standard metrics like SEL fail to capture the cumulative impact of repeated aircraft overflights. The international aviation body ICAO recommends a four-part 'Balanced Approach' to managing airport noise, encompassing noise reduction at the source, land-use planning, operational procedures, and operating restrictions.

A large study of nearly 75,000 female nurses living near 90 U.S. airports found that those exposed to higher levels of aircraft noise were more likely to have higher body mass index (BMI) and greater weight gain since age 18. Women exposed to the loudest aircraft noise (55 decibels or more) had an 11% higher chance of being obese and a 15% higher chance of falling into the highest category of weight gain compared to those in quieter areas. The findings suggest that chronic aircraft noise exposure — such as that experienced by residents near Sea-Tac Airport — may contribute to obesity risk, potentially through stress-related pathways including disrupted sleep and hormonal changes.

This Noise Technical Report, prepared by Landrum & Brown for the Port of Seattle in March 2024, analyzes noise impacts associated with near-term projects outlined in the Sustainable Airport Master Plan for Seattle-Tacoma International Airport. It is part of a broader Appendix J covering noise and noise-compatible land use, which also includes a Noise Modeling Protocol and a Construction Noise Technical Report. The report provides technical assessments to support planning decisions related to aircraft and construction noise in communities surrounding Sea-Tac Airport.

This Noise Technical Report, prepared by Landrum & Brown for the Port of Seattle in March 2024, analyzes noise impacts associated with near-term construction and development projects outlined in the Sustainable Airport Master Plan for Seattle-Tacoma International Airport. The report is part of Appendix J, which covers noise and noise-compatible land use, and was developed to satisfy both federal (NEPA) and state (SEPA) environmental review requirements. It provides technical findings to help assess how proposed airport improvements may affect noise levels in surrounding communities.