Those of you that are on the Siren Enthusiasts FaceBook page probably already saw this, but I believe this definitely deserves a share here.
The city of Sierra Madre, CA appears to have recently tested their warning siren...a B&M (20AR7 IIRC); this has to be the first recording of one of these ever captured! It sounds like it has a 14/16 ratio, but it needs to be confirmed. Check it out!
https://www.facebook.com/cityofsierrama ... =2&theater