Most electronic sirens are equipped with a PA.

These are typically integrated into the same system as the vehicle's electronic siren, and sound through the same speakers.

In the background, he heard a dart thump into the board, causing a raucous electronic siren to play.

Most vehicles are now fitted with electronic sirens, which can produce a range of different sounds.

As they approached, the electronic siren of the burglar alarm became louder.

A buzzing electronic siren suddenly activated at the science station, interrupting Sisko's guilty brooding.

All series are also designed to carry radio communications equipment and are wired for electronic sirens.

Multi-speaker electronic sirens often are alleged to have dead spots at certain angles to the vehicle's direction of travel.

At that moment Rachel heard the electronic siren of a fire engine.

That system was soon replaced with an air horn which was later replaced with an electronic siren still in use today.