Air horn
An air horn is a pneumatic device designed to create a loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm.
An air horn is a pneumatic device designed to create a loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm.
An air horn is a pneumatic device designed to create a loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm.
Source: Wikipedia "Air horn" · CC BY-SA 4.0
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