Category:Electromechanical Sirens
An electromechanical siren is a siren that uses an electric motor to drive a spinning rotor, or chopper, inside of a stationary stator. A (usually) equal number of holes, or ports, are inside the rotor and stator, with vanes in the rotor directing air through the ports. As air moves through the ports as the rotor spins, it is chopped at a certain frequency, creating sound. The more ports on the siren and the faster the rotor spins, the higher the peak pitch of the siren.
Pages in category "Electromechanical Sirens"
The following 138 pages are in this category, out of 138 total.
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- Scream Master
- Screamer
- SD-10
- Selay Güvenlik ve İkaz Sistemleri İmalat San. Tic. Ltd. Şti.
- Sentry 95
- Siracode Signal Co.
- Sireno No. A-D
- Sireno vertical sirens
- Sirex
- Siro-Drone
- SLEA
- Soundmaster Signals, Inc.
- Southern California Edison Model 120
- SS3 Defender
- Stanton sirens
- Sterling Siren Fire Alarm Co.
- Sterling Vertical Siren
- STH-10
- STL-10
- Super Sirex
- Swedish Electric Co.
- System 7000