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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.
Unidentified sounds (11 P) U. Unidentified flying objects (5 C, 7 P) W. ... Pages in category "Unexplained phenomena" The following 35 pages are in this category, out ...
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The bursts of sound resemble quacks, earning the recording the nickname “Bio-Duck.” Speculation about their source was varied. It could be an underwater submarine, or a fish .
Astronauts had noted ‘strange’ sounds – and space agency did not immediately have an explanation. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
An unexplained high-pitched tone has kept residents of a Portland suburb awake at night for at least a week. Mysterious high-pitched tone keeps Oregon residents up at night Skip to main content
The Hum is a name often given to widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise audible to many but not all people. Hums have been reported all over the world, including the United States, the United Kingdom, Australia and Canada.
The sound's source was roughly triangulated to , a remote point in the South Pacific Ocean west of the southern tip of South AmericaThe sound was detected by the Equatorial Pacific Ocean autonomous hydrophone array, [1] a system of hydrophones primarily used to monitor undersea seismicity, ice noise, and marine mammal population and migration.