Category:Rotating Sirens

A rotational siren is designed with a rotating mechanism that allows the projector to spin 360°. This design enables a more focused concentration of sound compared to omnidirectional sirens, improving the siren's ability to project sound with higher output and greater range. However, this comes at the cost of being able to deliver its full volume in only 1 direction at a time, which also leads to increased maintenance costs. These sirens can utilize various methods for rotation, such as belts, chains, or gears, and are typically driven by either the chopper motor or a separate motor. Most rotational sirens use collector rings and brushes to rotate freely without losing power. In contrast, some electronic sirens are directly wired and must oscillate back and forth to prevent the wire from snapping. Overall, these sirens have a narrow, unidirectional sound beam and rotate to cover a larger area.