Influence of stochastic behavior on the human threshold of hearing

Ilse Christine Gebeshuber

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The inner hair cells in the cochlea perform the crucial task of transforming mechanical sound signals into electrical activity. The cochlear nerve fibers code this information and convey it to the brain for further processing. This study investigates the performance of the system inner hair cell - primary auditory afferent nerve fibers at the physical limit of the mechano-electrical transduction for the human auditory frequency range. The Brownian motion of the hair cell's receptive organelle, the hair bundle, does not blunt the sensitivity, but in fact enlarges - especially in frequency regions which are most important for the perception of music and speech - via the mechanism of nonlinear stochastic resonance (SR) the dynamical range of the mechano-electrical transduction by at least one order of magnitude. The coding efficiency of small sinusoidal hair bundle deflections shows basic properties of the human hearing threshold curve for pure tones and corresponds to experimental results of noise-reduced tuning curves in mechano-receptors in the rat foot. Furthermore, the model explains how altered coding efficiency contributes to pathological changes in the spiking pattern which arise from morphological changes in the hair bundle structure (e.g., in noise-induced sensorineural hearing loss of cochlear origin).

Original languageEnglish
Pages (from-to)1855-1868
Number of pages14
JournalChaos, Solitons and Fractals
Volume11
Issue number12
DOIs
Publication statusPublished - Sep 2000
Externally publishedYes

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hair
hearing
Bundle
Nerve
thresholds
Cell
Coding
Fiber
Nonlinear Resonance
bundles
nerve fibers
Curve
Stochastic Resonance
Music
Deflection
Range of data
Receptor
Brownian motion
Tuning
coding

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics

Cite this

Influence of stochastic behavior on the human threshold of hearing. / Gebeshuber, Ilse Christine.

In: Chaos, Solitons and Fractals, Vol. 11, No. 12, 09.2000, p. 1855-1868.

Research output: Contribution to journalArticle

Gebeshuber, Ilse Christine. / Influence of stochastic behavior on the human threshold of hearing. In: Chaos, Solitons and Fractals. 2000 ; Vol. 11, No. 12. pp. 1855-1868.
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