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Effects of Interaural Decorrelation on Neural and Behavioral Detection of Spatial Cues

Saberi, Kourosh and Takahashi, Yoshifumi and Konishi, Masakazu and Albeck, Yehuda and Arthur, Ben J. and Farahbod, Haleh (1998) Effects of Interaural Decorrelation on Neural and Behavioral Detection of Spatial Cues. Neuron, 21 (4). pp. 789-798. ISSN 0896-6273. doi:10.1016/S0896-6273(00)80595-4.

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The detection of interaural time differences (ITDs) for sound localization critically depends on the similarity between the left and right ear signals (interaural correlation). We show that, like humans, owls can localize phantom sound sources well until the correlation declines to a very low value, below which their performance rapidly deteriorates. Decreasing interaural correlation also causes the response of the owl’s tectal auditory neurons to decline nonlinearly, with a rapid drop followed by a more gradual reduction. A detection-theoretic analysis of the statistical properties of neuronal responses could account for the variance of behavioral responses as interaural correlation is decreased. Finally, cross-correlation analysis suggests that low interaural correlations cause misalignment of cross-correlation peaks across different frequencies, contributing heavily to the nonlinear decline in neural and ultimately behavioral performance.

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Additional Information:© 1998 by Cell Press. Received April 10, 1998; revised August 12, 1998. Supported by National Institutes of Health grants DC03648–01 (K. S.) and DC00134–19A1 (M. K.) and a Human Frontier Science Program fellowship (Y. T. and Y. A.). We thank Bertrand Delgutte and David M. Green for commenting on an earlier draft of the paper. We also thank three anonymous reviewers for their helpful comments.
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Human Frontier Science Program fellowshipUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20151124-145147731
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Official Citation:Kourosh Saberi, Yoshifumi Takahashi, Masakazu Konishi, Yehuda Albeck, Ben J. Arthur, Haleh Farahbod, Effects of Interaural Decorrelation on Neural and Behavioral Detection of Spatial Cues, Neuron, Volume 21, Issue 4, October 1998, Pages 789-798, ISSN 0896-6273, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62396
Deposited By: Ruth Sustaita
Deposited On:25 Nov 2015 18:11
Last Modified:10 Nov 2021 23:01

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