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.

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 .

Upsweep . This sound was present when PMEL began recording SOSUS in August, 1991. It consists of a long train of narrow-band upsweeping sounds of several seconds duration each. The source level is high enough to be recorded throughout the Pacific.

Feb 26, 2024 · What are Upsweep Sounds? The Upsweep Sounds refer to an unidentified sound that has existed since the Pacific Marine Environmental Laboratory (PMEL) began recording Sound Surveillance System...

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Feb 28, 2024 · One of the most famous and disconcerting noises is the so-called Upsweep Sounds, which translates as "ascending sweep sound." The name comes from the fact that sounds repeatedly rise from low to high frequency. For human ears, they resemble the siren of an ambulance, and there are those who compare it to the howl of a supernatural creature.

Jul 20, 2012 · Recorded by the National Oceanic and Atmospheric Administration (NOAA) in 1991. This is the sound at 1X speed. Live on FOX with YouTube TV. Plus, get game day …

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Apr 27, 2017 · upsweep 英 ['ʌpswi:p] 美 [ʌp'swi:p] n. 向上弯曲，拢上去的头发，活泼化 vi. 向上曲，向上斜

Upsweep is an unidentified sound detected on the American National Oceanic and Atmospheric Administration'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. Superciliary upsweep or tented eyebrows.