Minutes of Quiet by Noise Monitor

I need a break

We all know that the noise is bad for human health–not merely ‘annoying’. We know that nighttime flights are especially bad due to sleep disruption. And we know that the gap between flights keeps shrinking as the number of operations increases.

This report show you the amount of time between flights as detected by the Port of Seattle’s NOMS. Some people can be awakened once and then are unable to fall back asleep. Others can, but the quality of sleep suffers. What does it do to the body to be awakened repeatedly during the night? These gaps are an area that needs to be studied more thoroughly.

Minutes of QuietSEA15 — Sylvester Middle School - 01/01/2024 to 12/31/2024 - Arrivals and Departures (2026-09-27 22:06)

All 24 Hours Prevalence
Median FQ Events per night: 0.0
Number of FQ nights with Avg Number of flights >1/hour: 4/366, >2/hour: 2/366, >3/hour: 1/366
Median Shoulder Events: AM: 0.0, PM: 0.0

Minutes of QuietSEA18 — 1205 S 226th St - 01/01/2024 to 12/31/2024 - DNL Hours Only - Arrivals and Departures (2026-09-27 22:06)

DNL Night Period (10pm–7am) Prevalence
Median FQ Events per night: 15.0
Number of FQ nights with Avg Number of flights >1/hour: 358/366, >2/hour: 286/366, >3/hour: 157/366
Median Shoulder Events: AM: 33.0, PM: 50.0

Minutes of QuietSEA13 — Cedarhurst Elementary - 01/01/2024 to 12/31/2024 - DNL Hours Only - Arrivals and Departures (2026-09-27 22:06)

DNL Night Period (10pm–7am) Prevalence
Median FQ Events per night: 5.0
Number of FQ nights with Avg Number of flights >1/hour: 172/366, >2/hour: 109/366, >3/hour: 48/366
Median Shoulder Events: AM: 28.0, PM: 31.0

[//jch_recovery_year_comparison_report]

Upcoming Events

Part 150 NCP Workshop — Burien
Add to CalendarMSaturday Oct 17: 10:00am

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
[...]
Part 150 NCP Workshop — SeaTac
Add to CalendarMMonday Oct 19: 6:00pm

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
[...]
Part 150 NCP Workshop — Des Moines
Add to CalendarMTuesday Oct 20: 6:00pm

Attend a Port of Seattle open house on the Part 150 Study Noise Compatibility Program (NCP). The Part 150 program determines the noise boundary around the airport and opportunities for noise mitigation such as sound insulation.
[...]

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