Blue Whale Song Recording (AUDIO) San Francisco State University Your browser does not support the audio element. Caption This is an audio recording of a blue whale's "song" (2.5 minutes) captured by San Francisco State University Professor Roger Bland at Pioneer Seamount Underwater Observatory off the coast of California. Blue Whale songs consist of an A call, a series of pulses, followed by a long, low moan called the B call. This A-B sequence is repeated over and over again, approximately once every 130 seconds. Bland analyzed more than 4,000 blue whale calls, recorded off the coast of California, and found that all the whales produced their B call at the same pitch -- 16 Hz. Results were published in the Journal of the Acoustical Society of America. Please see the related release : http://www.sfsu.edu/~news/prsrelea/fy10/002.html. Credit Roger Bland, San Francisco State University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.