Federal signal modulators in wail mode

[@settingsun3470]

I live in Stillwater OK and when Stillwater first put in their new siren system of Modulators, replacing 2t22s, they sounded in attack and it sounded just like this. Stillwater switched to alert soon after though.

[@gio11138]

Reminds me of Orting's Modulators.

[@SirensAndAlarmsOfNorthernIL]

Sounds like Shelby twp, MI’s system

[@alarmsynthsrus]

No, terrorist drill at the Rock Island Arsenal. They can be heard in alert about a minute into this video: watch?v=ugaKNGPe2WI

[@TheMatsushitaMan]

Is that a dual tone Mod I hear?