Characterizing cochlear mechano-electric transduction using a nonlinear systems identification procedure

The Journal of the Acoustical Society of America
Mark E ChertoffL Bian

Abstract

A nonlinear systems identification technique [J. S. Bendat, Nonlinear System Analysis and Identification from Random Data (Wiley, New York, 1990)] provided the frequency-domain parameters of a third-order system polynomial equation describing cochlear mechano-electric transduction (MET) in Mongolian gerbils. The magnitude of the linear system term was the largest followed by the cubic and quadratic terms. The phase of the linear and cubic system terms differed by approximately 180 deg and the phase of the quadratic term lay between. Between-animal and within-animal variability was smallest for the linear and cubic terms, and largest for the quadratic term. Summing linear and nonlinear coherence functions revealed that the third-order system polynomial equation characterized approximately 83% of MET for low frequencies and 92% for high frequencies. Animals exposed to a 4-kHz pure tone at 100 dB SPL for 20 min showed changes in the magnitude and phase of the parameters of the third-order polynomial equation. An increase in linear coherence and a decrease in nonlinear coherence occurred at frequencies centered at the exposure frequency. Below the exposure frequency, linear coherence decreased and nonlinear coherence increased. Sum...Continue Reading

Citations

Jul 27, 2002·The Journal of the Acoustical Society of America·Lin BianEmily Miller
Jan 13, 2004·The Journal of the Acoustical Society of America·Mark E ChertoffJeffery T Lichtenhan
Sep 21, 2004·The Journal of the Acoustical Society of America·David M Mills
Dec 18, 2004·The Journal of the Acoustical Society of America·Chul-Hee ChoiDavid Lerner
Apr 10, 2008·The Journal of the Acoustical Society of America·Jeffery T Lichtenhan, Mark E Chertoff
Nov 14, 2012·The Journal of the Acoustical Society of America·Mark E ChertoffJanna L Sorensen
Jul 1, 1997·The Journal of the Acoustical Society of America·M E ChertoffL Bian
Dec 3, 2015·The Journal of the Acoustical Society of America·M E ChertoffJ T Lichtenhan

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