Accurate tuning curves in a cochlear model

Author

Kates, James M.

Author_Institution

Center for Res. in Speech and Hearing Sci., City Univ. of New York, NY, USA

Volume

1

Issue

4

fYear

1993

fDate

10/1/1993 12:00:00 AM

Firstpage

453

Lastpage

462

Abstract

Most practical models of cochlear mechanics are based on approximations to the wave equation in the cochlea. These approximations engender compromises in the accuracy with which the cochlear motion can be reproduced. Tuning curves are compared here for two cochlear models, one based on a cascade of low-pass filter sections and the other based on a cascade of filter sections derived from a one-dimensional transmission line. The filters in the two simulations are designed to give comparable latency in the neural response to inputs at different frequencies, and the simulations include an active gain-control mechanism to adjust the characteristics of each section with changes in the input signal level. The resultant simulated tuning curves and neural outputs indicate that the modified transmission-line approximation yields a more accurate cochlear model

Keywords

cascade networks; ear; filtering and prediction theory; hearing; low-pass filters; neurophysiology; physiological models; transmission line theory; tuning; active gain-control mechanism; cochlear mechanics; cochlear model; filter sections cascade; input signal level; low-pass filter sections; modified transmission-line approximation; neural outputs; neural response; signal processing; simulations; tuning curves; wave equation approximation; Active filters; Computational modeling; Delay; Frequency; Humans; Low pass filters; Partial differential equations; Tail; Transmission lines; Tuning;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.242491

Filename

242491