Echolocation: high-frequency component in the click of the harbour porpoise (Phocoena ph. L.)
Møhl, B.; Andersen, S. (1973). Echolocation: high-frequency component in the click of the harbour porpoise (Phocoena ph. L.). J. Acoust. Soc. Am. 54(5): 1368-1372. http://dx.doi.org/10.1121/1.1914435
In: The Journal of the Acoustical Society of America. American Institute of Physics: New York. ISSN 0001-4966; e-ISSN 1520-8524, meer
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| Abstract |
Besides the already known low-frequency components of the Phocoena echolocation pulse, a narrow-band pulse of 0.1-msec duration, with the main energy between 110 and 150 kHz and a source level of 40 dB re 1 µbar at 1 m has been found. The properties of this pulse can explain how wires below 1-mm diam can be detected by echolocation. The results are consistent with the hypothesis that the emission is restricted to a narrow beam. |
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