Emulation An ambulance siren sounds!!

[slaphappygamer]

When the ambulance siren sounds, it sounds like a WAH-WAH pedal. The “WIIIIIUWIIIIIU” sounds like a single frequency is being modulated (stretched?) by a potentiometer, similar to a WAH-WAH pedal. Which is why I’m curious.

To me, the siren doesn’t just sound like someone flicking a switch and the siren.mp3 plays. It sounds like someone manually modulating the frequency. Is this true? Please tell me that the frequency is being manually modulated by a human. That would be fun to operate.

 

[yogirlalyssa]

i'd be flipping that switch LIKE CRAZY

 

[slaphappygamer]

WHOOMP WHOOMP

 

[JuanMena]

Ask @FAST6191
He might know how sirens work as he's been an active pirate and he's told me stories of his time as a paramedic.

 

[x65943]

As a former EMT I can tell you I would just flip a switch and the lights and sirens would play all by themselves

 

[impeeza]

They're some type of sirens:

The old ones uses a cylindrical drum with holes in the wall which turn quickly inside another drum slso with holes do the air is press and released so quick what make the sound. Those sound liked things on the movies about bombing alarms. If you turn them fast and then turn them slow there's the characteristic whoa whoa sound, normally that's is achieved by hand rotating a lever. Later automaticed devices attached to electrical motors was developed even with variable speed

Today they're electronic ones which generate variable waves at loud

 

[SylverReZ]

WHOOMP WHOOMP

 

[impeeza]