Hearing thresholds for periodic 60-kHz tone pulses in the beluga whale

C. Scott Johnson

doi:10.1121/1.400736

journal article Jun 01, 1991

Hearing thresholds for periodic 60-kHz tone pulses in the beluga whale

C. Scott Johnson

The Journal of the Acoustical Society of America Vol. 89 No. 6 pp. 2996-3001 · Acoustical Society of America (ASA)

View at Publisher Save 10.1121/1.400736

Abstract

Masked thresholds for periodic 60-kHz tone pulses were measured for the beluga whale (Delphinapterus leucas) for tone pulse durations of 0.025, 0.1, 0.3, 0.8, and 1.6 ms, and with repetition times ranging from 770 ms to continuous tones. In addition, masked thresholds were also measured for single pulse stimuli of 0.025, 0.1, 0.3, 0.8, 1.6, 10, 50, 200, and 1000 ms in duration. The data analysis used with human data was not adequate for the three shortest periodic tone stimuli and a rectangular filter, energy detection, model was used for these cases. The integration time estimated from the single tone pulse data (20 ms) was much longer than those obtained from the periodic tone pulse results. Whale integration times for periodic pulses were found to vary almost directly with pulse duration, unlike those reported humans, which are constant and independent of pulse duration. A system bandwidth of 1000 Hz was found to fit the data, a bandwidth much smaller than the critical ratio (2400 Hz) previously reported for the beluga whale.

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Published: Jun 01, 1991
Vol/Issue: 89(6)
Pages: 2996-3001

Authors

C

C. Scott Johnson

Naval Ocean Systems Center, San Diego, California 92152-5000

Cite This Article

C. Scott Johnson (1991). Hearing thresholds for periodic 60-kHz tone pulses in the beluga whale. The Journal of the Acoustical Society of America, 89(6), 2996-3001. https://doi.org/10.1121/1.400736

Hearing thresholds for periodic 60-kHz tone pulses in the beluga whale

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