5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

PeriphEar : A Nonlinear Active Model of the Auditory Periphery

Arnaud Robert (1), Jan Eriksson (2)

(1) CIRC Group, Swiss Federal Institute of Technology, Lausanne, Switzerland
(2) Physiology Department, University of Lausanne, Switzerland

This paper describes a phenomenological model of the auditory periphery which consists of a bank of nonlinear time-varying parallel filters. Realistic filter shapes are obtained with the all-pole gammatone filter (APGF) which provides both a good approximation of the far more complex wave-propagation or cochlear mechanics models and a very simple implementation. The model also includes an active, distributed feedback that controls the damping parameter of the APGF. As a result, the model reproduces several observed phenomena including compression and two-tone suppression. It is now used to study responses to complex stimuli in models of the auditory nerve and cochlear nucleus neurons and to provide physiologically plausible front-end for speech analysis.

Full Paper

Bibliographic reference.  Robert, Arnaud / Eriksson, Jan (1998): "Periphear : a nonlinear active model of the auditory periphery", In ICSLP-1998, paper 0748.