Interaural intensity and latency difference in the dolphin's auditory system

V V Popov; Supin AYa

doi:10.1016/0304-3940(91)90592-h

Interaural intensity and latency difference in the dolphin's auditory system

Neurosci Lett. 1991 Dec 9;133(2):295-7. doi: 10.1016/0304-3940(91)90592-h.

Authors

V V Popov¹, Supin AYa

Affiliation

¹ Institute of Evolutionary Morphology and Ecology of Animals, USSR Academy of Science, Moscow.

PMID: 1816509
DOI: 10.1016/0304-3940(91)90592-h

Abstract

Binaural hearing mechanisms were measured in dolphins (Inia geoffrensis) by recording the auditory nerve evoked response from the body surface. The azimuthal position of a sound source at 10-15 degrees from the longitudinal axis elicited interaural intensity disparity up to 20 dB and interaural latency difference as large as 250 microseconds. The latter was many times greater than the acoustical interaural time delay. This latency difference seems to be caused by the intensity disparity. The latency difference seems to be an effective way of coding of intensity disparity.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Acoustic Stimulation
Animals
Auditory Perception / physiology*
Dolphins / physiology*
Evoked Potentials, Auditory*
Female
Functional Laterality
Hearing / physiology*
Time Factors
Vestibulocochlear Nerve / physiology*