Inventions
Air Horn
Mechanical Engineering
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An air horn is a pneumatic device that produces a loud noise for signaling, working by passing a stream of compressed air through a reed or diaphragm inside a horn, which vibrates to create sound waves that the horn then amplifies. Air horns are widely fitted to large buses, semi-trailer trucks, fire trucks and trains as vehicle warning devices, to some ambulances, and to ships as a signaling device.
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