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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. Category:Unidentified sounds - Wikipedia

    en.wikipedia.org/wiki/Category:Unidentified_sounds

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  4. The Hum - Wikipedia

    en.wikipedia.org/wiki/The_Hum

    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 ...

  5. Category:Unexplained phenomena - Wikipedia

    en.wikipedia.org/wiki/Category:Unexplained_phenomena

    Upload file; Search. Search. Appearance. Donate; ... Unidentified sounds (11 P) U. ... Pages in category "Unexplained phenomena" The following 32 pages are in this ...

  6. Upsweep - Wikipedia

    en.wikipedia.org/wiki/Upsweep

    The sound was recorded in August, 1991, using the Pacific Marine Environmental Laboratory's underwater sound surveillance system, SOSUS. [ 1 ] [ 2 ] Loud enough to be detected throughout the entire Pacific Ocean , Upsweep remains one of the only detected sounds to have an unresolved origin . [ 3 ]

  7. WA phenomena featured on Netflix show of the unexplained. 6 ...

    www.aol.com/news/wa-phenomena-featured-netflix...

    The mystery has been shared by numerous news outlets, TV shows like “Files of the Unexplained,” on social media accounts like the popular YouTube channel Watcher’s “Mystery Files.” Yet ...

  8. 'NASA's Unexplained Files': Apollo 16 mystery

    www.aol.com/news/2014-03-11-nasas-unexplained...

    The 10th manned mission in the US Apollo space program was supposed to be a seemingly textbook one. However, the astronauts' return to Earth failed to truly mark the end of Apollo 16. The Science ...

  9. Wow! signal - Wikipedia

    en.wikipedia.org/wiki/Wow!_signal

    The Wow! signal represented as "6EQUJ5". The original printout with Ehman's handwritten exclamation is preserved by Ohio History Connection. [1]The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University's Big Ear radio telescope in the United States, then used to support the search for extraterrestrial intelligence.