This appendix from Seattle-Tacoma International Airport's 2013 Part 150 Noise Compatibility Study presents supplemental noise analysis results using the FAA's Integrated Noise Model, covering metrics such as Time Above Level, Number of Events Above Level, and Sound Exposure Level. The analysis was prepared for informational purposes only and cannot be used to justify noise mitigation measures, but helps illustrate how aircraft noise affects daily activities like speech and sleep for communities surrounding Sea-Tac. Contour maps and grid point data show projected 2018 noise impacts on noise-sensitive facilities including schools, hospitals, libraries, and places of worship in nearby cities such as SeaTac, Burien, Des Moines, and Tukwila.Open full document
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Appendix F of the Seattle-Tacoma International Airport Part 150 Noise Compatibility Study Update presents supplemental noise analysis results using FAA’s Integrated Noise Model (INM) Version 7.0b. It describes three supplemental noise metrics—Time Above Level (TA), Number of Events Above Level (NA), and Sound Exposure Level (SEL)—with contour maps for Future (2018) Baseline conditions. The appendix also includes a grid point analysis of noise levels at noise-sensitive public facilities such as schools, hospitals, and places of worship.