Quantitative Evaluation of Limit-Cycle Oscillator Models of Spontaneous Otoacoustic Emissions

  • Carrick L. Talmadge
  • Glenis R. Long
  • William J. Murphy
  • Arnold Tubis
Part of the Lecture Notes in Biomathematics book series (LNBM, volume 87)

Abstract

Single limit-cycle-oscillator models of spontaneous otoacoustic emissions (SOAE’s) are based on the assumption that the pattern of interactions between spontaneous emissions and external tones in the ear canal may be partially described by the gross compaction of a full cochlear model to a single nonlinear differential equation such as that of a free (or driven) Van der Pol oscillator. Such an equation incorporates, in a highly idealized way, the type of nonlinear-active damping which, if assumed to be present over certain portions of the cochlear partition, would produce stabilized cochlear self-oscillations and lead to measurable spontaneous emissions in the ear-canal. These models have been used successfully by our group and by Wit and collaborators to account for a number of features of the emission data including: a) statistical properties of emissions (e.g. Bialek and Wit, 1984; Wit, 1986; van Dijk, 1990); b) suppression of emissions (Long and Tubis, 1990) and synchronization (phase locking) of emissions by external tones (e.g., van Dijk, 1990; Long, et al., 1990); and c) reduction of the level of emissions by aspirin consumption (e.g., Long and Tubis, 1988a,b).

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • Carrick L. Talmadge
    • 1
  • Glenis R. Long
    • 2
  • William J. Murphy
    • 1
  • Arnold Tubis
    • 1
  1. 1.Department of PhysicsPurdue UniversityWest LafayetteUSA
  2. 2.Department of Audiology and Speech SciencesPurdue UniversityWest LafayetteUSA

Personalised recommendations