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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 ...
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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 ...
The post This is the loudest recorded sound in the history of Earth appeared first on BGR. To call sound an important part of human life would be an understatement. It’s so important, that MIT ...
Upsweep is an unidentified sound detected on the American NOAA's equatorial autonomous hydrophone arrays. This sound was present when the Pacific Marine Environmental Laboratory began recording its sound surveillance system, SOSUS, in August 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds in duration each.
In the local street system, it lies 15 blocks north of the zero meridian (Ellsworth Avenue, one block south of 1st Avenue), and would thus otherwise be known as 15th Avenue. The street was named for former Vice President Schuyler Colfax. At just under 50 miles (80 kilometers) in length, it is known as the "longest continuous commercial street ...
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]
The second season of Nickelodeon's "The Really Loud House" is resuming production in Albuquerque. According to Amber Dodson, New Mexico Film Office director, the live action series has its ...