Siren (noisemaker)

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This article is about a device producing loud noises. For the mythological creatures, see siren
A pneumatic siren. Such sirens can be found on many buildings
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A pneumatic siren. Such sirens can be found on many buildings

A siren is a device that is able to produce a loud noise. Sirens can be found on emergency vehicles, like ambulances. People also installed them on buildings, to warn of tornados, or air raids.

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