i decided to go to this STH-10, as it does regular tests, despite it being an hour drive. it's one of the few mechanichal sirens within a reasonable distance that tests regurally, besides some in oregon, which i may be able to go to soon

info:
siren model: Federal Signal STH-10A
port ratio: 12
siren location: 45°38'11.4"N 121°58'50.9"W
other sirens heard: n/a
recording distance: ~250 feet
camera used: Samsung Galaxy S21 5G
date/time recorded: 8/19/2024, 6:45 PM PST
testing scheduele: every monday at 6:45PM, ~10 second blast of alert