Otoacoustic emissions and cochlear modelling
Abstract
The results of experimental investigations of certain aspects of the behavior of otoacoustic emissions are presented. These include interactions between spontaneous otoacoustic emissions (SOAEs) and external tones (beating, frequency pulling, and frequency locking), interactions among SOAEs (mutual suppression and cubic-difference-tone emissions), and the effect of aspirin consumption on otoacoustic emissions and their associated threshold microstructure. A single Van der Pol oscillator is used to model some features of the interaction of an SOAE and an external tone. A three-oscillator model (two Van der Pol oscillators and a single passive-nonlinear oscillator) is used to model interactions among SOAEs. Finally, a linear model of the full cochlea is presented with a Van der Pol oscillator at a single site on the cochlear partition used to model an SOAE. The results of computer solutions of these models are compared to the results of experiment and are shown to be in qualitative agreement.
Degree
Ph.D.
Advisors
Tubis, Purdue University.
Subject Area
Acoustics
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