Elliott, Stephen J., Lineton, Ben and Ni, Guangjian
Fluid coupling in a discrete model of cochlear mechanics
Journal of the Acoustical Society of America, 130, (3), . (doi:10.1121/1.3607420).
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A discrete model of cochlear mechanics is introduced that includes a full, three-dimensional, description of fluid coupling. This formulation allows the fluid coupling and basilar membrane dynamics to be analyzed separately and then coupled together with a simple piece of linear algebra. The fluid coupling is initially analyzed using a wavenumber formulation and is separated into one component due to one-dimensional fluid coupling and one comprising all the other contributions. Using the theory of acoustic waves in a duct, however, these two components of the pressure can also be associated with a far field, due to the plane wave, and a near field, due to the evanescent, higher order, modes. The near field components are then seen as one of a number of sources of additional longitudinal coupling in the cochlea. The effects of non-uniformity and asymmetry in the fluid chamber areas can also be taken into account, to predict both the pressure difference between the chambers and the mean pressure. This allows the calculation, for example, of the effect of a short cochlear implant on the coupled response of the cochlea.
|Digital Object Identifier (DOI):
||acoustic wave propagation, bioacoustics, biological fluid dynamics, ear, hearing, linear algebra, nonlinear acoustics, physiological models
||Human Sciences Group, Signal Processing & Control Grp
||07 Oct 2011 16:08
||18 Apr 2017 01:30
|Further Information:||Google Scholar|
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