This infographic from FAA Draft Advisory Circular 150-5020-1A, 'Noise Control and Compatibility Planning for Airports' (January 2022) displays a decibel (dBA) scale from 0 to 140, comparing common outdoor sound sources (e.g., military jet takeoff at 140 dBA, gas lawnmower at 90 dBA) with indoor sound sources (e.g., rock band concert at 110 dBA, normal conversation at 60 dBA).

Notes

This infographic from FAA Draft Advisory Circular 150-5020-1A, ‘Noise Control and Compatibility Planning for Airports’ (January 2022) displays a decibel (dBA) scale from 0 to 140, comparing common outdoor sound sources (e.g., military jet takeoff at 140 dBA, gas lawnmower at 90 dBA) with indoor sound sources (e.g., rock band concert at 110 dBA, normal conversation at 60 dBA).

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As the source for federal transportation grants, the Puget Sound Regional Council was charged with developing a system to meet the growing need for commercial aviation. When the search for a second airport failed, they authorized the Port of Seattle to build the Third Runway, with a mandate to develop a noise abatement and mitigation program. In their effort to stop the Third Runway, the ACC argued over every detail of the Port's efforts--including property buyouts and sound insulation. The dispute was meant to be settled by a three member Expert Arbitration Panel. This is their final report. It finds 2-1, that the Port's program was insufficient in several respects. Despite that, funding for the Third Runway was approved by the PSRC, and the 'Port Package' program, proceeded largely unchanged. Expert Arbitration Panel's final decision finding that the Port of Seattle had not shown sufficient reduction in real on-the-ground noise impacts to satisfy noise reduction conditions required for approval of a third runway at Sea-Tac International Airport. The majority decision concluded the Port's noise abatement programs were insufficient despite being impressive in scope.

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