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Frequency tuning curves of the dolphin's hearing: envelope-following response study
V V Popov1, A Y Supin, V O Klishin
1Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow.
Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
|April 1, 1996
Abstract:
Simultaneous tone-tone masking in conjunction with the envelope-following response (EFR) recording was used to obtain tuning curves in dolphins (Tursiops truncatus). The EFR was evoked by amplitude-modulated probes of various frequencies. A modulation rate of 600 Hz was found to fit the requirement to have a narrow spectrum and evoke EFR of large amplitude. Tuning curves were obtained within the frequency range from 11.2 to 110 kHz. The Q10 values of the obtained tuning curves varied from 12-14 at the 11.2 kHz center frequency to 17-20 at the 64-90 kHz frequencies.