How do you make a siren?

How do you make a siren?

To make a simple, one-pitch siren, you'll only need two circles. If you would like a siren that has the distinct, two-tone sound of an air raid siren, cut out three circles instead. Trace each circle to the same size using a compass or circular object, then cut them out using a jigsaw or router.

How does a siren work?

How Sirens Work An electro-mechanical siren is a fairly simple device. … It pulls air into the siren axially through the intake, and blows it out radially through the holes in the stator. The second job of the rotor is to chop the incoming air stream into impulsive bursts.