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  Marine mammal sounds  
  52 Hz sound - blue whale call?  
 

52 Hz spectrogramDescription: 52 Hz "whale-like" signals were first reported by Watkins et al.(2000). On average these tones had a center frequency of 51.75 Hz and lasted 5-7 sec. These tones are usually produced in groups of 2-6 and were recorded in the NE Pacific.

Click on spectrogram for full-sized image.

bloop sound241K wav file(The recorded signal has been sped up 10 times) 

 

 

 

  
     

 
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