Lowered pH alters decay but not speed of tectorial membrane waves

Shirin Farrahi*, Roozbeh Ghaffari, Dennis M. Freeman

*Corresponding author for this work

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

2 Scopus citations

Abstract

Tectorial membrane (TM) traveling waves and mechanical shear impedances were measured in artificial endolymph baths at neutral and acidic pHs. Lowering pH from 7 to 4 significantly decreases the spatial extent of TM waves but has a relatively minor effect on wave speed. At pH 4, the imaginary component of TM shear impedance, which relates to the shear modulus, drops significantly; whereas, the real component, which relates to viscosity, is reduced less. These results suggest that shear modulus, and not viscosity, controls the extent of TM waves at lower pH.

Original languageEnglish (US)
Title of host publicationWhat Fire is in Mine Ears
Subtitle of host publicationProgress in Auditory Biomechanics - Proceedings of the 11th International Mechanics of Hearing Workshop
Pages403-404
Number of pages2
DOIs
StatePublished - Dec 12 2011
Event11th International Mechanics of Hearing Workshop - What Fire is in Mine Ears: Progress in Auditory Biomechanics - Williamstown, MA, United States
Duration: Jul 16 2011Jul 22 2011

Publication series

NameAIP Conference Proceedings
Volume1403
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other11th International Mechanics of Hearing Workshop - What Fire is in Mine Ears: Progress in Auditory Biomechanics
CountryUnited States
CityWilliamstown, MA
Period7/16/117/22/11

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Keywords

  • fixed charge
  • pH
  • tectorial membrane
  • traveling waves

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Farrahi, S., Ghaffari, R., & Freeman, D. M. (2011). Lowered pH alters decay but not speed of tectorial membrane waves. In What Fire is in Mine Ears: Progress in Auditory Biomechanics - Proceedings of the 11th International Mechanics of Hearing Workshop (pp. 403-404). (AIP Conference Proceedings; Vol. 1403). https://doi.org/10.1063/1.3658119