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Science 3 September 1971:
Vol. 173. no. 4000, pp. 912 - 914
DOI: 10.1126/science.173.4000.912
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Articles

Computer Derivation of Some Dolphin Echolocation Signals

Richard A. Altes 1

1 ESL Incorporated, 495 Java Drive, Sunnyvale, California 94086

Recent advances in radar theory have given rise to a straightforward method of sonar signal design. The method involves computer maximization of a signal-to-interference ratio. The procedure has been used to derive sonar signals that can accurately measure target velocity. When two dolphins were placed in a situation conducive to the utilization of such signals, their waveforms were similar to those that had been theoretically derived.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)