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They are 12 feet (3.7 m) long, built atop a quarter section of a Dodge truck chassis rail, and weigh an estimated 3 short tons (2.7 t). Its six horns are each 3 feet (91 cm) long. The siren has an output of 138 dB(C) (30,000 watts), and can be heard as far as 25 miles (40 km) away.
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 ...
An air horn is a pneumatic device designed to create an extremely 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. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, then the horn amplifies the sound making it louder.
In Germany and some other European countries, the pneumatic two-tone (hi-lo) siren consists of two sets of air horns, one high pitched and the other low pitched. An air compressor blows the air into one set of horns, and then it automatically switches to the other set. As this back and forth switching occurs, the sound changes tones.
This Q2B or "Q-siren" is mounted on a Pierce Platform Aerial Fire Truck owned by the City of Bellingham, WA. The Q2B siren (" Q-siren ") [ 1 ] is an electromechanical siren that is produced by the Federal Signal Corporation and is most recognizable for its sound, which is trademarked , and the look of the siren.
At more than 20 feet long and weighing 5 tons, this hulking herbivore had a pair of 2 footlong blade-shaped horns on its majestic, frill-shaped head. It also had two more 16-inch horns above its ...