Warning Siren Monthly Tests and Tones
The Warning Siren Tones are:
Rescue: the Wail sound slowly alternates between a constant ascending and descending high-low sound, like a (woooooOOOOooooo) style noise.
Fire: the Hi-Lo sound produces separate higher/lower tones resulting in an (ee-oo-ee-oo) “European-style” sound.
Tornado / Emergency: the signal will climb and hold on a steady tone.