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See media help. 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 ...
Pages in category "Unidentified sounds". The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes. List of unexplained sounds.
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. [1][2] They are sometimes named according to the locality where ...
Bloop was an ultra-low-frequency, high amplitude underwater sound detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) in 1997. [1] By 2012, earlier speculation that the sound originated from a marine animal [2] was replaced by NOAA's description of the sound as being consistent with noises generated via non-tectonic ...
Fairy circle (arid grass formation) Fast blue optical transient. Flyby anomaly. Fractional quantum Hall effect.
Certain words in the English language represent animal sounds: the noises and vocalizations of particular animals, especially noises used by animals for communication. The words can be used as verbs or interjections in addition to nouns , and many of them are also specifically onomatopoeic .
An auditory hallucination, or paracusia, [1] is a form of hallucination that involves perceiving sounds without auditory stimulus. While experiencing an auditory hallucination, the affected person hears a sound or sounds that did not come from the natural environment. A common form of auditory hallucination involves hearing one or more voices ...
The Most Mysterious Song on the Internet. " The Most Mysterious Song on the Internet " α is the nickname given to a cassette recording of an unknown song, most likely created in the mid-1980s. The song was recorded from a German Norddeutscher Rundfunk (NDR) radio broadcast sometime during the mid-1980s, likely in or after 1984. [3]