A fluid-structural model of the cochlea using wave finite element method


Ni, G., Elliott, S.J. and Mace, B.R. (2010) A fluid-structural model of the cochlea using wave finite element method. In, Brennan, M.J., Kovacic, Ivana, Lopes, V., Murphy, K., Petersson, B., Rizzi, S. and Yang, T. (eds.) Recent Advances Structural Dynamics: Proceedings of the X International Conference. Southampton, GB, University of Southampton.

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Description/Abstract

The human cochlea is very effective at discriminating sound waves at different frequencies, but is also notable for its complicated geometry and small physical size. This paper describes a elative simple representation of the cochlea that efficiently models wave propagation along it by incorporating fluid-structure coupling between the two fluid chambers and the inhomogeneous basilar membrane (BM) that separates them. The numerical solution is initially obtained by using the Finite Element (FE) method, by connecting a series of elements with longitudinal variation in Young's modulus. The wavenumbers of each section are then obtained by applying the Wave Finite Element (WFE) method and the Wentzel–Kramers–Brillouin (WKB) approximation is used to model the wave propagation. The WFE method provides a new and powerful way of predicting the important characteristics in the cochlea at low computational cost which is less than half in both time and of the memory requirement of a full FE model.

Item Type: Book Section
Additional Information: Paper No.023(Format - USB Pen Drive)
ISBNs: 0854329102 (paperback)
9780854329106 (paperback)
Keywords: wave finite element, cochlea, fluid-structural coupling, wkb approximation
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Dynamics
Faculty of Engineering and the Environment > Institute of Sound and Vibration Research > Signal Processing & Control Research Group
ePrint ID: 160697
Date Deposited: 20 Jul 2010 13:41
Last Modified: 27 Mar 2014 19:16
URI: http://eprints.soton.ac.uk/id/eprint/160697

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