Modeling the level-dependent latency of cochlear transient responses

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Human auditory brainstem responses to tone-burst stimuli exhibit remarkable consistency across tone frequency in the dependence of their latency on stimulus level. This level-dependent latency is simulated in a nonlinear, active, transmission-line model of cochlear mechanics. In this model, feedback forces due to outer hair cell (OHC) motility counteract damping in the cochlear partition, but only when they have the proper phase relative to vibration of the reticular lamina. The role of the tectorial membrane (TM) in controlling the phase the OHC force is crucial to the success of the model. In the model, TM tuning restricts the frequency range over which damping reduction is achieved. This restriction allows OHC motility to improve cochlear frequency resolution without creating instability. The only nonlinear element in the model represents OHC mechanoelectrical transduction. Level dependence of the latency of cochlear transients has been a controversial issue and its simulation presents a significant challenge to cochlear models because of the wide range of signal-processing constraints that it imposes on the model. The present model results suggest that the level dependence of ABR tone-burst latency at high frequencies is mostly due to cochlear mechanics and at low frequencies is mostly due to adaptation.

Original languageEnglish (US)
Title of host publicationTo the Ear and Back Again - Advances in Auditory Biophysics
Subtitle of host publicationProceedings of the 13th Mechanics of Hearing Workshop
EditorsChristopher Bergevin, Sunil Puria
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416703
DOIs
Publication statusPublished - May 31 2018
Event13th Mechanics of Hearing Workshop: To the Ear and Back Again - Advances in Auditory Biophysics, MoH 2017 - St. Catharines, Canada
Duration: Jun 19 2017Jun 24 2017

Publication series

NameAIP Conference Proceedings
Volume1965
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other13th Mechanics of Hearing Workshop: To the Ear and Back Again - Advances in Auditory Biophysics, MoH 2017
CountryCanada
CitySt. Catharines
Period6/19/176/24/17

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Neely, S. T., & Rasetshwane, D. M. (2018). Modeling the level-dependent latency of cochlear transient responses. In C. Bergevin, & S. Puria (Eds.), To the Ear and Back Again - Advances in Auditory Biophysics: Proceedings of the 13th Mechanics of Hearing Workshop [040005] (AIP Conference Proceedings; Vol. 1965). American Institute of Physics Inc.. https://doi.org/10.1063/1.5038465