Masked Tonal Hearing Thresholds in the Beluga Whale.

摘要

Masked tonal thresholds were measured for a beluga whale at one noise level and 32 frequencies between 40 Hertz and 115 Hz. Critical ratios were estimated and compared with those previously measured for the bottlenose dolphin. Beluga whale critical ratios were found to be about 3 decibels lower than those of the bottlenose dolphin. Absolute tonal thresholds were extended below previous measurements to 40 Hz. Keywords: Marine biosystems, Masked tonal hearing thresholds, Acoustics, Reprints, Signal detection in noise. (jg)