Modeling the characteristics of spontaneous otoacoustic emissions in lizards

Hero P. Wit*, Geoffrey A. Manley, P. van Dijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Lizard auditory papillae have proven to be an attractive object for modelling the production of spontaneous otoacoustic emissions (SOAE). Here we use an established model (Vilfan and Duke, 2008) and extend it by exploring the effect of varying the number of oscillating elements, the strength of the parameters that describe the coupling between oscillators, the strength of the oscillators, and additive noise. The most remarkable result is that the actual number of oscillating elements hardly influences the spectral pattern, explaining why spectra from very different papillar dimensions are similar. Furthermore, the spacing between spectral peaks primarily depends on the reactive coupling between the oscillator elements. This is consistent with observed differences between lizard species with respect to tectorial covering of hair cells and SOAE peak spacings. Thus, the model provides a basic understanding of the variation in SOAE properties across lizard species. (C) 2019 Elsevier B.V. All rights reserved.

Original languageEnglish
Article number107840
Number of pages12
JournalHearing Research
Volume385
Early online date15-Nov-2019
DOIs
Publication statusPublished - Jan-2020

Keywords

  • BOBTAIL LIZARD
  • FREQUENCY PLATEAUS
  • COCHLEAR AMPLIFIER
  • STIMULUS-FREQUENCY
  • ACTIVE PROCESS
  • HAIR-CELLS
  • STABILITY
  • AMPLITUDE
  • CHAIN

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