Alarm

The sound of a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. This class covers sounds associated with the device itself, not voice that has been carried via the telephone network.

Sounds made by a clock that is designed to make an audible signal at a specific time. The primary use of alarm clocks is to awaken people from their night's sleep.

The sound of a loud noise-making device used to provide warnings to people nearby. A siren typically consists of a single pitch that changes either smoothly or abruptly on timescales around one second.

The sound of a signaling device typically placed near a building's entrance with which a visitor can announce their presence to occupants.

Sounds of a mechanical, electromechanical, or piezoelectric signaling device that emits a steady, highly-audible tone with a spectrum extending to high frequencies.

Sounds emitted by a device that senses smoke, typically to warn of a fire.

Sounds of a system designed to warn people when smoke, fire, carbon monoxide or other emergencies are present. Alarms can be either motorized bells or wall-mountable sounders or horns.

The loud sound of an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle or its contents.

The sound of a motor vehicle accessory whose purpose is to provide an audible alert of the vehicle's presence.

The sound of a percussive signaling instrument mounted on a bicycle for warning pedestrians and other cyclists.

The sound of a pneumatic device mounted on large vehicles designed to create an extremely loud noise for signalling purposes.

A signaling sound used primarily in foggy conditions to warn watercraft of the presence of nearby vessels or other navigational hazards.

The sound of an instrument that produces sound from a stream of forced air.