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Frequency tuning of the dolphin's hearing as revealed by auditory brain-stem response with notch-noise masking
V V Popov1, A Y Supin, V O Klishin
1Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia.
The Journal of the Acoustical Society of America
|January 4, 1998
Abstract:
Notch-noise masking was used to measure frequency tuning in a dolphin (Tursiops truncatus) in a simultaneous-masking paradigm in conjunction with auditory brain-stem evoked potential recording. Measurements were made at probe frequencies of 64, 76, 90, and 108 kHz. The data were analyzed by fitting the rounded-exponent model of the auditory filters to the experimental data. The fitting parameter values corresponded to the filter tuning as follows: QER (center frequency divided by equivalent rectangular bandwidths) of 35 to 36.5 and Q10 dB of 18 to 19 at all tested frequencies.