5th International Conference on Spoken Language Processing
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.
Bibliographic reference. Robert, Arnaud / Eriksson, Jan (1998): "Periphear : a nonlinear active model of the auditory periphery", In ICSLP-1998, paper 0748.