Prediction of inertial effects due to bone conduction in a 2D box model of the cochlea
Prediction of inertial effects due to bone conduction in a 2D box model of the cochlea
A 2D box model of the cochlea has been used to predict the basilar membrane, BM, velocity and the fluid flow caused by two components of bone conduction: due to inertia of the middle ear and due to inertia of the cochlear fluids. A finite difference approach has been used with asymmetric fluid chambers, that enables an investigation of the effect of varying window stiffness, due to otosclerosis for example. The BM is represented as a series of locally reacting single degree of freedom systems, with graded stiffness along the cochlea to represent the distribution of natural frequencies and with a damping representative of the passive cochlea. The velocity distributions along the passive BM are similar for harmonic excitation via the middle ear inertia or via the fluid inertia, but the variation of the BM velocity magnitude with excitation frequency is different in the two cases. Excitation via the middle ear is suppressed if the oval window is assumed to be blocked, but the excitation via the cochlear fluids is still possible. By assuming a combined excitation due to both middle ear and fluid excitation, the difference between the overall response can be calculated with a flexible and a blocked oval window, which gives a reasonable prediction of Carhart’s notch.
Halpin, Alice
5258229c-30b8-4728-ac84-68c3d1dc968d
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Ni, Guangjian
f6ddc112-7d81-403a-b97a-7ecbc8fd4e59
2015
Halpin, Alice
5258229c-30b8-4728-ac84-68c3d1dc968d
Elliott, Stephen
721dc55c-8c3e-4895-b9c4-82f62abd3567
Ni, Guangjian
f6ddc112-7d81-403a-b97a-7ecbc8fd4e59
Halpin, Alice, Elliott, Stephen and Ni, Guangjian
(2015)
Prediction of inertial effects due to bone conduction in a 2D box model of the cochlea.
12th International Workshop on the Mechanics of Hearing, Cape Sounio, Greece.
23 - 29 Jun 2014.
6 pp
.
(doi:10.1063/1.4939370).
Record type:
Conference or Workshop Item
(Paper)
Abstract
A 2D box model of the cochlea has been used to predict the basilar membrane, BM, velocity and the fluid flow caused by two components of bone conduction: due to inertia of the middle ear and due to inertia of the cochlear fluids. A finite difference approach has been used with asymmetric fluid chambers, that enables an investigation of the effect of varying window stiffness, due to otosclerosis for example. The BM is represented as a series of locally reacting single degree of freedom systems, with graded stiffness along the cochlea to represent the distribution of natural frequencies and with a damping representative of the passive cochlea. The velocity distributions along the passive BM are similar for harmonic excitation via the middle ear inertia or via the fluid inertia, but the variation of the BM velocity magnitude with excitation frequency is different in the two cases. Excitation via the middle ear is suppressed if the oval window is assumed to be blocked, but the excitation via the cochlear fluids is still possible. By assuming a combined excitation due to both middle ear and fluid excitation, the difference between the overall response can be calculated with a flexible and a blocked oval window, which gives a reasonable prediction of Carhart’s notch.
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1.4939370.pdf_expires=1455724877&id=id&accname=2103930&checksum=01D0C5B51B8C7B41889590957D4C1442
- Accepted Manuscript
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Published date: 2015
Venue - Dates:
12th International Workshop on the Mechanics of Hearing, Cape Sounio, Greece, 2014-06-23 - 2014-06-29
Organisations:
Signal Processing & Control Grp
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Local EPrints ID: 388032
URI: http://eprints.soton.ac.uk/id/eprint/388032
PURE UUID: ce1519ae-f75d-41e3-bcca-adca9bf59976
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Date deposited: 01 Mar 2016 14:51
Last modified: 14 Mar 2024 22:50
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Contributors
Author:
Alice Halpin
Author:
Guangjian Ni
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