Cogprints

Frequency ratios of SOAEs match the inter-cell spacing of outer hair cells: support for a SAW model of the cochlea

Bell, Andrew (2001) Frequency ratios of SOAEs match the inter-cell spacing of outer hair cells: support for a SAW model of the cochlea. [Conference Poster]

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Abstract

A new resonance theory of hearing models the cochlea as a surface acoustic wave (SAW) resonator. This SAW model calls for outer hair cells (OHCs) to respond piezoelectrically to intracochlear fluid pressure, and, via associated electomotility, to generate slowly propagating surface tension waves (ripples) on the undersurface of the overlying tectorial membrane. Because OHCs are combined sensors and effectors, the ripples continue to reverberate between the precisely aligned rows of OHCs in the same way as electromechanical ripples do between the interdigital electrodes of a SAW resonator. The distance OHC1–OHC3 is 1 wavelength (360 degrees phase delay). This mechanism is conjectured as providing the positive feedback and gain underlying the cochlear amplifier.

Item Type:Conference Poster
Keywords:cochlea, surface acoustic wave resonator, SAW, outer hair cell, OHC, SOAE
Subjects:Neuroscience > Biophysics
Biology > Theoretical Biology
ID Code:1800
Deposited By:Bell, Andrew
Deposited On:07 Nov 2001
Last Modified:11 Mar 2011 08:54

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