Intracochlear pressure and derived quantities from a three-dimensional model

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Intracochlear pressure is calculated from a physiologically based, three-dimensional gerbil cochlea model. Olson [J. Acoust. Soc. Am. 103, 3445-3463 (1998); 110, 349-367 (2001)] measured gerbil intracochlear pressure and provided approximations for the following derived quantities: (1) basilar membrane velocity, (2) pressure across the organ of Corti, and (3) partition impedance. The objective of this work is to compare the calculations and measurements for the pressure at points and the derived quantities. The model includes the three-dimensional viscous fluid and the pectinate zone of the elastic orthotropic basilar membrane with dimensional and material property variation along its -length. The arrangement of outer hair cell forces within the organ of Corti cytoarchitecture is incorporated by adding the feed-forward approximation to the passive model as done previously. The intracochlear pressure consists of both the compressive fast wave and the slow traveling wave. A Wentzel-Kramers-Brillowin asymptotic and numerical method combined with Fourier series expansions is used to provide an efficient procedure that requires about is to compute the response for a given frequency. Results show reasonably good agreement for the direct pressure and the derived quantities., This confirms the importance of the three-dimensional motion of the fluid for an accurate cochlear model. (c) 2007 Acoustical Society of America.
Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
Issue Date
2007-08
Language
English
Article Type
Article
Keywords

BASILAR-MEMBRANE; COCHLEAR MODEL; GERBIL COCHLEA; HOOK REGION; HAIR-CELLS; GUINEA-PIG; INNER-EAR; MECHANICS; RESPONSES; CAT

Citation

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, v.122, no.2, pp.952 - 966

ISSN
0001-4966
DOI
10.1121/1.2747162
URI
http://hdl.handle.net/10203/246002
Appears in Collection
ME-Journal Papers(저널논문)
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