Whale calls recorded during a seismic survey in the Gulf of California.

Top: This spectrogram of ocean sound was recorded by a hydrophone during an air gun seismic experiment in the Gulf of California

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Whale calls recorded during a seismic survey in the Gulf of California.

Top: This spectrogram of ocean sound was recorded by a hydrophone during an air gun seismic experiment in the Gulf of California in 2002. Color indicates the loudness of less 

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LiveScience.com | Photo By Dan Lizarralde
Fri, Mar 15, 2013 10:30 AM EDT
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