Upsweep, Unidentified Deep Sea Sounds

Scientists describe Upsweep's sound like an ambulance siren or a monster's howl.
However, until today, scientists did not know for sure the origin of this upsweep sound.

Original Article : https://www.pmel.noaa.gov/acoustics/s...

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The Bloop :    • The Bloop, a Mysterious Sound From th...  
Julia:    • Julia, the Unexplained Sound From the...  

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