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A new cochlear model: Viscous fluid motion (A)
J. Acoust. Soc. Am. Volume 89, Issue 4B, pp. 1865-1865 (April 1991)
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The cochlear fluid is considered to be actual viscous fluid in this paper and the Navier-Stokes equation used to describe the viscous fluid motion is linearized and then transformed to a typical transport equation and a Poisson equation. By solving the two equations using the Fourier series method, a new two-dimensional cochlear model is finally derived. The frequency responses of the model are presented and believed to be much more improved than those derived before, especially in the low-frequency slope. Therefore, they are more consistent with recent experimental data [Robles et al., J. Acoust. Soc. Am. 80, 1364 (1986)]. It appears that the inclusion of the fluid viscosity sharpens the low-frequency slope of the cochlear model. The high-frequency slope is not as sharp as desired for the effects of the middle ear and the basilar membrane (BM) nonlinearity (signal-dependent damping) are not included. The new cochlear model also makes such inclusion feasible.
©1991 Acoustical Society of America
©1991 Acoustical Society of America
| Permalink: | http://dx.doi.org/10.1121/1.2029302 |
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