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Thus, an outstretched hand reaching upward and pumping is a signal to the driver of an air horn equipped vehicle, requesting a toot. In modern trucks and buses, the horn is actuated by a button on the steering wheel (just like a normal car horn). Some trucks and buses have both electric and air horn, selectable by a switch on the dashboard.
The Chrysler Air Raid Siren is an outdoor warning siren produced during the Cold War era that has an output of 138 dB(C) at 100 feet. It was known as the Chrysler Bell Victory Siren during its first generation, which was between the end of World War II and the fall of the Berlin Wall. It is reputed to be the loudest air raid siren ever produced ...
A horn grille is a part of some designs of car or other motor vehicle that has an electric horn, such as a motor scooter. Larger, louder air horns, as found on trucks (lorries) and buses, are driven by air compressors, or supplied by reservoirs charged to operate their air brakes. The compressor forces air past a diaphragm in the horn's throat ...
A small industrial siren. These used smaller horns than the others. They had one 100 watt driver per horn (AL-1000) or two 100 watt drivers per horn (AL-2000). Horns could be removed for uni-directional applications. AL-4000/AL-6000/AL-8000 Electronic none none 1984-1995 Omni/uni Directional dB rating depends on model.
A fire truck uses an air horn to alert cars of its presence. Air horn - These devices force compressed air from the vehicle's air brake system against a diaphragm, creating a loud noise. Air horns used on emergency vehicles usually have a distinctive tone so they can easily be distinguished from other large vehicles, commanding urgency.
The horns became an issue within the past few years. At a Nov. 27 promotion ceremony, the horns were blown so loudly that nothing else could be heard, another police officer said.
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