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A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
Built during the Cold War era from 1952 to 1957 by Chrysler, its power plant contained a newly designed Firepower Hemi V8 engine with a displacement of 331 cubic inches (5.42 L) and producing 180 horsepower (130 kW).
In fact, this sound machine offers only the essentials, including a volume knob, a timer, and just six built-in sounds (White Noise, Thunder, Ocean, Rain, Summer Night, and Brook).
LOUD Audio, LLC is a professional audio company based in the United States, operating in the U.S., Canada, and Shenzhen, China. Originally founded as Mackie Designs, Inc., the name was changed to Loud Technologies Inc in 2003 to differentiate its founding subsidiary, mixing console manufacturer Mackie from its eponymous brand name.
The distinctive distorted sound of a human voice amplified by a megaphone is widely recognized, from its use in train and bus stations and sports arenas. Applied to music, it gives the sound of an antique acoustic gramophone record player. It has been used in radio advertisements and popular music to give retro and often humorous effects. A ...
Blowing pressure – Sound level increases as blowing pressure is raised, [59] [60] although there may be an optimum pressure at which sound level peaks. [48] Aspect ratio – Sound level increases as whistle length is reduced, increasing frequency. For example, depressing the piston of a variable-pitch steam whistle changed the frequency from ...
Zoom Corporation was founded in Tokyo in 1983 and in 2004, established ZOOM HK LTD as a logistics base in Hong Kong. In 2009, it set up ZOOM Dongguan Corporation (China) as a quality control operation; [3] 2013, formed ZOOM North America, LLC (US) as a distribution base; 2017, listed on Tokyo Stock Exchange JASDAQ (Standard); [4] [5] In 2018, acquired shares of Mogar Music S.p.A. (Italy ...
Showco was established in 1970 by Jack Maxson and Rusty Brutsche, and Jack Calmes, and is known for helping to pioneer post Woodstock-era stadium rock shows by providing state-of-the-art sound equipment for famous acts beginning with Led Zeppelin, Three Dog Night and James Taylor. [1]