Document Detail

Echolocation signals of wild Atlantic spotted dolphin (Stenella frontalis).
MedLine Citation:
PMID:  12558295     Owner:  NLM     Status:  MEDLINE    
An array of four hydrophones arranged in a symmetrical star configuration was used to measure the echolocation signals of the Atlantic spotted dolphin (Stenella frontalis) in the Bahamas. The spacing between the center hydrophone and the other hydrophones was 45.7 cm. A video camera was attached to the array and a video tape recorder was time synchronized with the computer used to digitize the acoustic signals. The echolocation signals had bi-modal frequency spectra with a low-frequency peak between 40 and 50 kHz and a high-frequency peak between 110 and 130 kHz. The low-frequency peak was dominant when the signal the source level was low and the high-frequency peak dominated when the source level was high. Peak-to-peak source levels as high as 210 dB re 1 microPa were measured. The source level varied in amplitude approximately as a function of the one-way transmission loss for signals traveling from the animals to the array. The characteristics of the signals were similar to those of captive Tursiops truncatus, Delphinapterus leucas and Pseudorca crassidens measured in open waters under controlled conditions.
Whitlow W L Au; Denise L Herzing
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  113     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-01-31     Completed Date:  2003-03-31     Revised Date:  2006-12-27    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  598-604     Citation Subset:  IM    
Marine Mammal Research Program, Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1109, Kailua, Hawaii 96734, USA.
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MeSH Terms
Dolphins / physiology*
Echolocation / physiology*
Signal Processing, Computer-Assisted*
Sound Spectrography*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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