Siren Frequency Generator - For Use With Synth Makers

Number of Ports:    (For dual tone, calculate each tone separately.)

Motors RPM: 

Power Cycles:   (60 - North America/50 - Europe)



Notes:

For dual tone sirens, you must do each tone differently. For example, if you wanted a 10/12 port siren, you would have to calculatethe frequency of the 10 port side, then the 12 port side, or vice versa. Do not put in 10/12 as the ports, you must do one after the other.

The motor speed for North American sirens is 3450 RPM's. For the Federal Model 2, it's 6396. And for the Thunderbolt you'll have to look up the 7 different speeds.
British sirens (Carter, Klaxon, etc.) are usually 2880 RPM.
I dont know about the German sirens.

Credit:

Original Idea: Noah Covert (ncovert on ARS)

New Web Version: Ryan H. (Ryan on ARS)