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Dreamegg’s portable sound machine offers all the standard features of a typical nightstand-style model. As the name implies, it offers 11 sounds, including several white noises (like a vacuum ...
A LectroFan white noise machine A clock radio that includes a white noise machine. A white noise machine is a device that produces a noise that calms the listener [citation needed], which in many cases sounds like a rushing waterfall or wind blowing through trees, and other serene or nature-like sounds.
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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 ...
All of the above machines use 1/4" tape. NAGRA TRVR – A rare stereo machine designed with the 19" rack format. It is a reel to reel 1/4" tape recorder designed for automatic long recording using the four standard tape speeds. The machine is equipped with an automatic start recording device actuated by the input signal and, at the tape end ...
The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in ...