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infrasound generator

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  • Bird vocalization — Bird song redirects here. For other uses, see Birdsong (disambiguation). A male Blackbird (Turdus merula) singing. Bogense havn, Funen, Denmark.   …   Wikipedia

  • Underground nuclear testing — Preparation for an underground nuclear test at the Nevada Test Site in the 1990s. Nuclear weapons …   Wikipedia

  • Dennis Rea — (photo: Anne Joiner) Background information Born July 7, 1957 (1957 07 07) (age 54) Origin …   Wikipedia

  • Anti-frogman techniques — are security methods developed to protect watercraft, ports and installations, and other sensitive resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen or other divers.Risks and threats to be defended… …   Wikipedia

  • Binaural beats — or binaural tones are auditory processing artifacts, or apparent sounds, the perception of which arises in the brain independent of physical stimuli. This effect was discovered in 1839 by Heinrich Wilhelm Dove.The brain produces a phenomenon… …   Wikipedia

  • Environmental impact of wind power — Livestock ignore wind turbines,[1] and continue to graze as they did before wind turbines were installed. Compared to the environmental impact of traditional energy sources, the environmental impact of wind power is relatively minor. Wind power… …   Wikipedia

  • Poltergeist — Audio|De poltergeist.ogg|Poltergeist (from German poltern , meaning to rumble or make noise, and Geist , meaning ghost , spirit , or embodiment ) denotes a demonic spirit or ghost that manifests itself by moving and influencing… …   Wikipedia

  • Ultrasound — Not to be confused with Supersonic .Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy,… …   Wikipedia

  • Steam whistle — A steam whistle is a device used to produce sound with the aid of live steam. Unlike a horn, the sounding mechanism of a whistle contains no moving parts (compare to train horn).The whistle consists of the following main parts, as seen on the… …   Wikipedia

  • Baudline — Infobox Software name = baudline caption = Baudline Signal Analyzer developer = [http://sigblips.com SigBlips] released = ? frequently updated = yes programming language = ? operating system = Linux, FreeBSD, Solaris language = ? genre =… …   Wikipedia

  • Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …   Wikipedia

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