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A I Akopian

Publications and source records attributed to A I Akopian.

9 recordsLinked to original sources
PubMedDate not supplied

Comparative characteristics of spatial hearing in the dolphin Tursiops truncatus and man.

Directional hearing in dolphins and man was studied by measuring thresholds of detection of signals in noise relative to angle of incidence of interference. The data obtained, evidence of the presence of definite spatial directionality of the hearing system of the dolphin, is expressed in a sharp improvement of thresholds of detection of signals in noise corresponding to the distance of the source of noise from the source of the positive signal in the high frequency range. This effect was also discovered in man, but to a lesser degree.

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PubMedDate not supplied

[Noise resistance of the dolphin auditory analyzer as a function of the directional angle of the noise].

Masked tonal thresholds by noise in the bottlenose dolphin have been measured as a function of angle of noise direction. Sharp directional selectivity of hearing has been discovered resulting in an abrupt decrease of noise masking with the increase of the angle of noise coming. It has been shown that narrow directional characteristics of hearing is an angle 8 degrees plus or minus 2 degrees for the level of minus 3db. It is one of the main mechanisms supplying the echolocation system of the dolphin with the high level of resistance to noise.

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