A horn is a sound-making device installed on motor vehicles, trains, boats, and other types of vehicles. The sound it makes usually resembles a "honk" or a "beep". The driver uses the horn to warn oth
The single reed bulb horn was popular on early automobiles.
Horn of a 1926 Rolls-Royce Phantom I Open Tourer Windovers
Modern electric horns mounted in engine compartment
The Leslie S5T, a locomotive air horn with five 'chimes'
A siren is a noise-making warning device. There are two general types: mechanical sirens and electronic sirens. Civil defense sirens are mounted in fixed locations and used to warn of natural disaster
Vehicle horn
…List of auto parts Vehicle-mounted siren Vehicle-mounted whistle…
A Whelen WPS-2805 electronic siren imported to Saudi Arabia by HSS Engineering for use as a civil defense siren.
There are 8,200 alarm sirens for civil protection throughout Switzerland. They are tested once a year, on the first Wednesday of February. Sound sampleⓘ
The air raid siren used to alert the town of Lowestoft during World War II.