Tectorial membrane traveling waves: A new mechanism for longitudinal coupling

A. J. Aranyosi, Roozbeh Ghaffari, Dennis M. Freeman

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

4 Scopus citations

Abstract

The ability of the TM to support traveling waves suggests that its motion in response to sound may be more complex than previously believed. To investigate this possibility, we have studied responses of a wave model of the TM to distributed pressures predicted from a passive long-wave cochlear model. The resulting TM motions have a peak near the best frequency of the local BM drive, a notch at a lower frequency, and negative group delays at frequencies from well below to slightly above the best frequency. The negative group delays suggest that TM motion below the best frequency is dominated by the contribution of backward-traveling TM waves. Above the best frequency, forward-traveling TM waves dominate the response. These features are robust against variations in the wavelength and decay constant of the TM waves. Taken together, the notches in the TM magnitude response, negative group delays in the phase response, and increased sharpness of tuning are inconsistent with classical TM models. These phenomena can be explained in terms of TM waves propagating in both the apical and basal directions, highlighting the importance of modeling TM motion as a global wave phenomenon.

Original languageEnglish (US)
Title of host publicationConcepts and Challenges in the Biophysics of Hearing - Proceedings of the 10th International Workshop on the Mechanics of Hearing, MoH 2008
EditorsDavid T. Kemp, Nigel P. Cooper
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages262-268
Number of pages7
ISBN (Electronic)9789812833778
StatePublished - Jan 1 2008
Event10th International Workshop on the Mechanics of Hearing - Concepts and Challenges in the Biophysics of Hearing, MoH 2008 - Newcastle, United Kingdom
Duration: Jul 27 2008Jul 31 2008

Publication series

NameConcepts and Challenges in the Biophysics of Hearing - Proceedings of the 10th International Workshop on the Mechanics of Hearing, MoH 2008

Conference

Conference10th International Workshop on the Mechanics of Hearing - Concepts and Challenges in the Biophysics of Hearing, MoH 2008
CountryUnited Kingdom
CityNewcastle
Period7/27/087/31/08

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ASJC Scopus subject areas

  • Biotechnology
  • Biomedical Engineering

Cite this

Aranyosi, A. J., Ghaffari, R., & Freeman, D. M. (2008). Tectorial membrane traveling waves: A new mechanism for longitudinal coupling. In D. T. Kemp, & N. P. Cooper (Eds.), Concepts and Challenges in the Biophysics of Hearing - Proceedings of the 10th International Workshop on the Mechanics of Hearing, MoH 2008 (pp. 262-268). (Concepts and Challenges in the Biophysics of Hearing - Proceedings of the 10th International Workshop on the Mechanics of Hearing, MoH 2008). World Scientific Publishing Co. Pte Ltd.