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The vuvuzela / v uː v uː ˈ z ɛ l ə / is a horn, with an inexpensive injection-moulded plastic shell about 65 centimetres (2 ft) long, which produces a loud monotone note, typically around B♭ 3 [2] (the first B♭ below middle C). [3] Some models are made in two parts to facilitate storage, and this design also allows pitch variation.
A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.
The diaphone horn was based directly on the organ stop of the same name invented by Robert Hope-Jones, creator of the Wurlitzer organ. [1] [2] Hope-Jones' design was based on a piston that was closed only at its bottom end and had slots, perpendicular to its axis, cut through its sides; the slotted piston moved within a similarly slotted cylinder.
Under the law, drivers also cannot have a horn that emits “an unreasonably loud or harsh sound or a whistle.” You can have an air horn train horn on your vehicle, but you can’t use it legally.
A noisemaker is something intended to make a loud noise, usually for fun. Instruments or devices commonly considered "noisemakers" include: pea whistles; air horns, composed of a pressurized air source coupled to a horn, designed to create an extremely loud noise; fireworks, such as firecrackers, bottle rockets, bang snaps and others
You need Frederick M. Clancy, otherwise known throughout Texas and the country as “Fog Horn” Clancy. Born in 1882, Clancy got his start as a ranch hand just outside Mineral Wells when he was ...
(right) Electric megaphones use a type of horn loudspeaker called a reflex or reentrant horn. The sound waves travel in a zigzag path through concentric widening ducts (b, c, and d) . An electric megaphone is a handheld public address system , an electronic device that amplifies the human voice like an acoustic megaphone, using electric power.
Sounds at 120 decibels, comparable to an emergency vehicle siren, may cause discomfort to human hearing, according to the National Council on Aging.
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