Wave propagation patterns in a "classical" three-dimensional model of the cochlea

Egbert De Boer, Alfred Nuttall, Christopher A. Shera

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The generation mechanisms of cochlear waves, in particular those that give rise to otoacoustic emissions (OAEs), are often complex. This makes it difficult to analyze wave propagation. In this paper two unusual excitation methods are applied to a three-dimensional stylized classical nonlinear model of the cochlea. The model used is constructed on the basis of data from an experimental animal selected to yield a smooth basilar-membrane impedance function. Waves going in two directions can be elicited by exciting the model locally instead of via the stapes. Production of DPOAEs was simulated by presenting the model with two relatively strong primary tones, with frequencies f1 and f 2, estimating the driving pressure for the distortion product (DP) with frequency 2f1 - f2, and computing the resulting DP response pattern - as a function of distance along the basilar membrane. For wide as well as narrow frequency separations the resulting DP wave pattern in the model invariably showed that a reverse wave is dominant in nearly the entire region from the peak of the f2-tone to the stapes. The computed DP wave pattern was further analyzed as to its constituent components with the aim to isolate their properties.

Original languageEnglish (US)
Pages (from-to)352-362
Number of pages11
JournalJournal of the Acoustical Society of America
Volume121
Issue number1
DOIs
StatePublished - 2007

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cochlea
three dimensional models
wave propagation
products
membranes
animals
estimating
Waves
Cochlea
Three-dimensional
impedance
excitation

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Wave propagation patterns in a "classical" three-dimensional model of the cochlea. / De Boer, Egbert; Nuttall, Alfred; Shera, Christopher A.

In: Journal of the Acoustical Society of America, Vol. 121, No. 1, 2007, p. 352-362.

Research output: Contribution to journalArticle

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