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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 1973 report cites a university study of fifty cases of people complaining about a "low throbbing background noise" that others were unable to hear. The sound, always peaking between 30 and 40 Hz (hertz), was found to only be heard during cool weather with a light breeze, and often early in the morning. These noises were often confined to a 10 ...
Videos of eerie noises erupting from the skies have recently surfaced on YouTube, sending people into a panic around the world. The video above shows a particularly frightening episode of this ...
“A pulsing sound from a speaker in Boeing’s Starliner spacecraft heard by NASA astronaut Butch Wilmore aboard the International Space Station has stopped,” the space agency said in a statement.
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 January 2025. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...
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The sound's source was roughly triangulated to , a remote point in the South Pacific Ocean west of the southern tip of South America The 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.
A skyquake is a phenomenon where a loud sound is reported to originate from the sky. It often manifests as a banging, or a horn-like noise. It often manifests as a banging, or a horn-like noise. The sound may cause noticeable vibration in the ceiling or across a particular room.