Outer hair cell electromechanical properties in a nonlinear piezoelectric model.

Yi Wen Liu, Stephen T. Neely

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A nonlinear piezoelectric circuit is proposed to model electromechanical properties of the outer hair cell (OHC) in mammalian cochleae. The circuit model predicts (a) that the nonlinear capacitance decreases as the stiffness of the load increases, and (b) that the axial compliance of the cell reaches a maximum at the same membrane potential for peak capacitance. The model was also designed to be integrated into macro-mechanical models to simulate cochlear wave propagation. Analytic expressions of the cochlear-partition shunt admittance and the wave propagation function are derived in terms of OHC electro-mechanical parameters. Small-signal analyses indicate that, to achieve cochlear amplification, (1) nonlinear capacitance must be sufficiently high and (2) the OHC receptor current must be sensitive to the velocity of the reticular lamina.

Original languageEnglish (US)
Pages (from-to)751-761
Number of pages11
JournalThe Journal of the Acoustical Society of America
Volume126
Issue number2
DOIs
StatePublished - Aug 2009

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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