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Coordinates: 50°00′00″S 100°00′00″W / 50.000000°S 100.000000°W / -50.000000; -100.000000
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According to the NOAA description, it "rises rapidly in frequency over about one minute and was of sufficient amplitude to be heard on multiple sensors, at a range of over 5,000 km." NOAA's system ruled out its origin as any known man-made sound, such as a submarine or bomb, or familiar geological sounds such as volcanoes or earthquakes. While the audio profile of the bloop does resemble that of a living creature, the system identified it as unknown because it was far too loud for that to have been the case: it was several times louder than [[blue whale|the loudest known biological sound]]. Five other significant unexplained sounds have been named by NOAA: [[Julia (unidentified sound)|Julia]], [[Train (unidentified sound)|Train]], [[Slow Down (unidentified sound)|Slowdown]], [[Whistle (unidentified sound)|Whistle]], and [[Upsweep (unidentified sound)|Upsweep]].<ref>{{cite web |url= http://www.damninteresting.com/the-call-of-the-bloop |title= The Call Of The Bloop |author= Alan Bellows |date= 2006-04-23 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.youtube.com/watch?v=rEuaYp_OujM |title=The bloop - An Unexplained Phenomenon [Actual Sound] |date= 2009-02-20 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://archives.cnn.com/2002/TECH/science/06/13/bloop/ |publisher= [[CNN]] |title= Tuning in to a deep sea monster |date= 2002-06-13 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.pmel.noaa.gov/vents/acoustics/specs_all.html |title= Acoustics Monitoring Program |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.science.org.au/nova/newscientist/102ns_001.htm |title= Calls from the deep |publisher= New Scientist |author= David Wolman |date= 2002-06-15 |accessdate= 2010-01-06}}</ref>
According to the NOAA description, it "rises rapidly in frequency over about one minute and was of sufficient amplitude to be heard on multiple sensors, at a range of over 5,000 km." NOAA's system ruled out its origin as any known man-made sound, such as a submarine or bomb, or familiar geological sounds such as volcanoes or earthquakes. While the audio profile of the bloop does resemble that of a living creature, the system identified it as unknown because it was far too loud for that to have been the case: it was several times louder than [[blue whale|the loudest known biological sound]]. Five other significant unexplained sounds have been named by NOAA: [[Julia (unidentified sound)|Julia]], [[Train (unidentified sound)|Train]], [[Slow Down (unidentified sound)|Slowdown]], [[Whistle (unidentified sound)|Whistle]], and [[Upsweep (unidentified sound)|Upsweep]].<ref>{{cite web |url= http://www.damninteresting.com/the-call-of-the-bloop |title= The Call Of The Bloop |author= Alan Bellows |date= 2006-04-23 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.youtube.com/watch?v=rEuaYp_OujM |title=The bloop - An Unexplained Phenomenon [Actual Sound] |date= 2009-02-20 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://archives.cnn.com/2002/TECH/science/06/13/bloop/ |publisher= [[CNN]] |title= Tuning in to a deep sea monster |date= 2002-06-13 |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.pmel.noaa.gov/vents/acoustics/specs_all.html |title= Acoustics Monitoring Program |accessdate= 2010-01-06}}</ref><ref>{{cite web |url= http://www.science.org.au/nova/newscientist/102ns_001.htm |title= Calls from the deep |publisher= New Scientist |author= David Wolman |date= 2002-06-15 |accessdate= 2010-01-06}}</ref>


Dr. Christopher Fox of the NOAA speculated that the Bloop may be [[ice calving]] in [[Antarctica]].<ref>{{cite web |url=http://archives.cnn.com/2001/TECH/science/09/07/listening.ocean/ |publisher= [[CNN]] |title= Scientists tune in to sounds of the sea |date=2001-09-07 |accessdate= 2010-03-13}}</ref> A year later Dr. Fox was paraphrased speculating it was likely animal in origin. <ref>{{cite web |url= http://www.science.org.au/nova/newscientist/102ns_001.htm |title= Calls from the deep |publisher= New Scientist |author= David Wolman |date= 2002-06-15 |accessdate= 2010-03-13}}</ref>
Dr. Christopher Fox of the NOAA speculated that the Bloop may be [[ice calving]] in [[Antarctica]].<ref>{{cite web |url=http://archives.cnn.com/2001/TECH/science/09/07/listening.ocean/ |publisher= [[CNN]] |title= Scientists tune in to sounds of the sea |date=2001-09-07 |accessdate= 2010-03-13}}</ref> A year later Dr. Fox was paraphrased speculating it was likely animal in origin, and that the source of the sound could have been an underwater fart. <ref>{{cite web |url= http://www.science.org.au/nova/newscientist/102ns_001.htm |title= Calls from the deep |publisher= New Scientist |author= David Wolman |date= 2002-06-15 |accessdate= 2010-03-13}}</ref>


==In popular culture==
==In popular culture==

Revision as of 06:52, 19 April 2010

50°00′00″S 100°00′00″W / 50.000000°S 100.000000°W / -50.000000; -100.000000

This article is about the underwater sound. For the programming language, see BlooP and FlooP.
A spectrogram of Bloop.
Bloop.ogg
The Bloop, from the NOAA website at 16x the original speed.
Problems playing this file? See media help.

The Bloop is the name given to an ultra-low frequency and extremely powerful underwater sound detected by the U.S. National Oceanic and Atmospheric Administration (NOAA) several times during the summer of 1997. The source of the sound remains unknown.

Analysis

The sound, traced to somewhere around 50° S 100° W (a remote point in the south Pacific Ocean west of the southern tip of South America), was detected repeatedly by the Equatorial Pacific Ocean autonomous hydrophone array, which uses U.S. Navy equipment originally designed to detect Soviet submarines.

According to the NOAA description, it "rises rapidly in frequency over about one minute and was of sufficient amplitude to be heard on multiple sensors, at a range of over 5,000 km." NOAA's system ruled out its origin as any known man-made sound, such as a submarine or bomb, or familiar geological sounds such as volcanoes or earthquakes. While the audio profile of the bloop does resemble that of a living creature, the system identified it as unknown because it was far too loud for that to have been the case: it was several times louder than the loudest known biological sound. Five other significant unexplained sounds have been named by NOAA: Julia, Train, Slowdown, Whistle, and Upsweep.[1][2][3][4][5]

Dr. Christopher Fox of the NOAA speculated that the Bloop may be ice calving in Antarctica.[6] A year later Dr. Fox was paraphrased speculating it was likely animal in origin, and that the source of the sound could have been an underwater fart. [7]

See also

  • Slow Down, a similar unidentified underwater sound.
  • The Hum, a phenomenon of unexplained sound.

References

  1. ^ Alan Bellows (2006-04-23). "The Call Of The Bloop". Retrieved 2010-01-06.
  2. ^ "The bloop - An Unexplained Phenomenon [Actual Sound]". 2009-02-20. Retrieved 2010-01-06.
  3. ^ "Tuning in to a deep sea monster". CNN. 2002-06-13. Retrieved 2010-01-06.
  4. ^ "Acoustics Monitoring Program". Retrieved 2010-01-06.
  5. ^ David Wolman (2002-06-15). "Calls from the deep". New Scientist. Retrieved 2010-01-06.
  6. ^ "Scientists tune in to sounds of the sea". CNN. 2001-09-07. Retrieved 2010-03-13.
  7. ^ David Wolman (2002-06-15). "Calls from the deep". New Scientist. Retrieved 2010-03-13.
  8. ^ "Bloop!". J.J. Abrams' Projects. 2007-08-03. Retrieved 2010-01-06.
  9. ^ http://www.noiseaddicts.com/2008/08/strange-sounds-earth-bloop-hum-mistpouffers/
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