November 21, 2009
UTNE READER

Ocean Noise

(Page 2 of 2)

July-August 2008
by Staff, Utne Reader 
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Airgun with echosounders 

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The Ocean’s Natural Noises

Here are sound samples from belugas and stenella blue dolphins. Ocean Conservation Research explains that these toothed whales’ sounds “pick up at the upper range of human sound perception and in some cases extend up to 10 times higher than our highest frequency perception. Toothed whales use their vocalizations for echo-location, or ‘bio-sonar’ as well as for high speed, short range communication to their kin.”

Beluga whales hunting 

Stenella blue dolphin

Special thanks to Micheal Stocker, director of Ocean Conservation Research for coordinating the use of these files and providing background on their significance.

Blue dolphin and beluga whale songs courtesy of Manon.org. The Audiograms in these sound examples were produced by Raven software, created by the Cornell Lab of Ornithology Bioacoustics Lab under the direction of Christopher Clark, Kurt Fristrup and Tim Krein.

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