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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.
A spectrogram of Upsweep. Upsweep is a sound detected by the U.S. National Oceanic and Atmospheric Administration's (NOAA) equatorial autonomous hydrophone arrays. The sound was recorded in August, 1991, using the Pacific Marine Environmental Laboratory's underwater sound surveillance system, SOSUS, and is loud enough to be detected throughout the entire Pacific Ocean.
Unidentified sounds (11 P) U. Unidentified flying objects (5 C, 9 P) W. Anomalous weather (19 P) Pages in category "Unexplained phenomena" The following 33 pages are ...
Chapman helped to analyze the data from the recordings in the 1980s and discovered the data contained a “gold mine” of information about many kinds of sound in the ocean, including from marine ...
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Pages in category "Unidentified sounds" The following 11 pages are in this category, out of 11 total. ... This page was last edited on 28 February 2024, ...
In the case of Kokomo, Indiana, a city with heavy industry, the origin of the hum was thought to have been traced to two sources. The first was a 36 Hz tone from a cooling tower at the local DaimlerChrysler casting plant and the second was a 10 Hz tone from an air compressor intake at the Haynes International plant. [ 21 ]
The AD-5 Skyraider that he ditched on that January day in 1957 has remained in two pieces 66 years later — about 1,000 feet from each other — deep below the surface on the ocean floor. The ...