StART SIRRPP Update — Acoustic Testing Procedures and DNL Metrics — Slide 12 (February 26, 2025)

This slide from a Seattle-Tacoma International Airport (SEA) noise remedy presentation summarizes acoustic testing procedures, stating that testing followed the FAA-approved 2017 Acoustic Testing Plan (ATP). Key metrics cited include a 70dB DNL exterior noise contour threshold within the 2014 SEA Noise Remedy Boundary and a 27dB Noise Level Reduction (NLR) example calculated from interior and façade measurements.

Notes

This slide from a Seattle-Tacoma International Airport (SEA) noise remedy presentation summarizes acoustic testing procedures, stating that testing followed the FAA-approved 2017 Acoustic Testing Plan (ATP). Key metrics cited include a 70dB DNL exterior noise contour threshold within the 2014 SEA Noise Remedy Boundary and a 27dB Noise Level Reduction (NLR) example calculated from interior and façade measurements.

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