Emergency siren

An emergency siren was a noise-making system that produced a penetrating warning sound. Such devices were installed on many facilities and could be activated to give the order to evacuate the premises. Many starships were also equipped with such sirens, including the Hammerhead-class cruisers that served with the Galactic Republic Navy during the Jedi Civil War and the modern-day CR90 corvettes.

Appearances

 * Star Wars: Knights of the Old Republic
 * Jedi Apprentice: The Dark Rival
 * Star Wars Episode III: Revenge of the Sith
 * Star Wars Episode IV: A New Hope
 * Vader's Quest