This NASA technical report investigates the mathematical relationship between the area enclosed by aircraft noise contour maps and the noise levels measured at standard certification points around an airport. Written by researcher Clemans A. Powell at NASA Langley Research Center in 2003, the study aims to help aviation planners and policymakers better understand how noise certification data can be used to predict the geographic extent of noise impact around airports like Sea-Tac.

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This NASA Technical Memorandum by Clemans A. Powell of Langley Research Center examines the relationship between aircraft noise contour areas and noise levels measured at FAA certification points. The report explores how certification point measurements relate to the broader noise footprint around airports. Published in September 2003 as part of the NASA STI Report Series.

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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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