Finite element modelling of cochlear electrical coupling

Teal, Paul D. and Ni, Guangjian (2016) Finite element modelling of cochlear electrical coupling. Journal of the Acoustical Society of America, 140 (4), 2769-2779. (doi:10.1121/1.4964897).

Record type: Article

Abstract

The operation of each hair cell within the cochlea generates a change in electrical potential at the frequency of the vibrating basilar membrane beneath the hair cell. This electrical potential influences the operation of the cochlea at nearby locations and can also be detected as the cochlear microphonic signal. The effect of such potentials has been proposed as a mechanism for the non-local operation of the cochlear amplifier, and the interaction of such potentials has been thought to be the cause of the broadness of cochlea microphonic tuning curves. The spatial extent of influence of these potentials is an important parameter for determining the significance of their effects. Calculations of this extent have typically been based on calculating the longitudinal resistance of each of the scalae from the scala cross sectional area, and the conductivity of the lymph. In this paper, the range of influence of the electrical potential is examined using an electrical finite element model. It is found that the range of influence of the hair cell potential is much shorter than the conventional calculation, but is consistent with recent measurements.

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More information

Accepted/In Press date: 30 September 2016

Published date: 18 October 2016

Additional Information: Copyright (2016) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in (Teal and Ni, J. Acoust. Soc. Am. 140, 2769 (2016)) and may be found at http://scitation.aip.org/content/asa/journal/jasa/140/4/10.1121/1.4964897

Keywords: cochlea, electrical coupling, finite element

Organisations: Signal Processing & Control Grp