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  2. List of unexplained sounds - Wikipedia

    en.wikipedia.org/wiki/List_of_unexplained_sounds

    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.

  3. The Hum - Wikipedia

    en.wikipedia.org/wiki/The_Hum

    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.

  4. Skyquake - Wikipedia

    en.wikipedia.org/wiki/Skyquake

    A skyquake is a phenomenon where a loud banging sound is reported to originate from the sky. The sound may cause noticeable vibration in the ceiling or across a particular room. Those who experience skyquakes typically do not have a clear explanation for what caused them and they are perceived as mysterious.

  5. NASA offers explanation for bizarre 'trumpet noise' phenomena

    www.aol.com/news/2015-05-22-nasa-attempts-to...

    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 ...

  6. Mysterious sounds emanating from the depths of the ocean ...

    www.aol.com/mysterious-sounds-emanating-depths...

    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 .

  7. Nasa responds after ‘strange noises’ heard coming from ...

    www.aol.com/news/nasa-responds-eerie-noises...

    Astronauts had noted ‘strangesounds – 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 ...

  8. Category:Unexplained phenomena - Wikipedia

    en.wikipedia.org/wiki/Category:Unexplained_phenomena

    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 ...

  9. Category:Unidentified sounds - Wikipedia

    en.wikipedia.org/wiki/Category:Unidentified_sounds

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