Why Do Large Vehicles Use Air Horns?

1 Answers
Wade
07/28/25 2:58pm
Air horns play a powerful warning role during driving. Principle of Air Horns: They generally consist of four main components: an air source, a control switch, a sound generator, and a sound amplifier. The air source is the origin of compressed gas, which can be either a DC electric air pump or the vehicle's own air supply. The control switch is typically an electromagnetic switch connected to the horn button in the cab. The sound generator mainly contains a diaphragm made of materials such as paper, silicone, or metal, which produces a whistle sound through high-frequency vibration. The sound amplifier has a tapered structure (narrow at one end and wide at the other) to make the sound louder and travel farther. Classification of Air Horns: Currently, there are two common types of air horns: electric air horns and electronically controlled air horns. Electric air horns use a DC motor-driven air pump to generate compressed air, which is then directed into the horn through an air tube to produce the whistle sound. This type of horn can be used on motorcycles and small cars.
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