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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).
These reflected sound waves, when added to the direct sound, cause cancellation and addition at assorted frequencies (e.g. from resonant room modes), thus changing the timbre and character of the sound at the listener's ears. The human brain is sensitive to small variations in reflected sound, and this is part of the reason why a loudspeaker ...
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).
The speed of sound in steam is predictable if steam dryness is known. [45] Also, the specific volume of steam for a given temperature decreases with decreasing dryness. [46] [39] Two examples of estimates of speed of sound in steam calculated from whistles blown under field conditions are 1,326 and 1,352 feet per second. [47]
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]
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Dec. 6—The camera is rolling for another New Mexico film production. The second season of Nickelodeon's "The Really Loud House" is resuming production in Albuquerque. According to Amber Dodson ...