Position of an acoustic window in a beluga whale: Computation based on auditory evoked potential latencies.

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ID: 39442
2019
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Abstract
In a beluga whale, the positions of sound receiving areas on the head surface were determined by comparing the acoustic delays from different sound source positions. For this investigation, auditory evoked potentials (AEPs) in response to short tone pips were recorded. Latencies of the first AEP wave that presumably reflected the activity of the auditory nerve were measured at different sound source azimuths. For AEPs of equal amplitudes, the difference in AEP latencies was attributed to the difference in the acoustic delays. These delay differences were used to compute the azimuths of sound receiving points. Measurements were conducted at frequencies from 22.5 to 90 kHz in half-octave steps. At all stimulus frequencies, the receiving points were located 24-38 cm caudal of the melon tip, which is near a proximal part of the lower jaw. Thus, the results indicated the latero-mandibular acoustic window. Possible causes for not finding a lateral or ventro-mandibular window are discussed.
Reference Key
popov2019positionthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Popov, V V;Supin, A Ya;Nechaev, D I;Lemazina, A A;Sysueva, E V;
Journal the journal of the acoustical society of america
Year 2019
DOI
10.1121/1.5111752
URL
Keywords Keywords not found

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