A 2-Dimensional active cochlear model for analog VLSI implementation

In this paper an active cochlear model for analogue VLSI implementation is proposed. The model incorporates the effect of the outer hair cells in the living cochlea, which control the quality factor of the basilar membrane filters. The outer hair cells are incorporated as an extra voltage source in series with the basilar membrane resonator. Its value saturates as the input signal becomes larger, making the behaviour rather closer to that of a passive model. The simulation results show this nonlinear phenomenon, which is also seen in the living cochlea.

[1]  Renato Nobili,et al.  How well do we understand the cochlea? , 1998, Trends in Neurosciences.

[2]  B. P. Bogert,et al.  A Dynamical Theory of the Cochlea , 1950 .

[3]  Allyn E. Hubbard,et al.  Analysis and Synthesis of Cochlear Mechanical Function Using Models , 1996 .

[4]  J. Allen,et al.  Cochlear micromechanics--a physical model of transduction. , 1980, The Journal of the Acoustical Society of America.

[5]  D. Kemp.  Stimulated acoustic emissions from within the human auditory system. , 1978, The Journal of the Acoustical Society of America.

[6]  J. Ashmore.  A fast motile response in guinea‐pig outer hair cells: the cellular basis of the cochlear amplifier. , 1987, The Journal of physiology.

[7]  André van Schaik,et al.  Pseudo-voltage domain implementation of a 2-dimensional silicon cochlea , 2001, ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196).

[8]  Eric Fragnière,et al.  Analogue VLSI emulation of the cochlea , 1998 .

[9]  E Zwicker,et al.  Suppression and (2f1-f2)-difference tones in a nonlinear cochlear preprocessing model with active feedback. , 1986, The Journal of the Acoustical Society of America.

[10]  S. Neely,et al.  A model for active elements in cochlear biomechanics. , 1986, The Journal of the Acoustical Society of America.

[11]  E de Boer.  No sharpening? a challenge for cochlear mechanics. , 1983, The Journal of the Acoustical Society of America.

[12]  Eberhard Zwicker,et al.  A hardware cochlear nonlinear preprocessing model with active feedback. , 1986, The Journal of the Acoustical Society of America.

[13]  Richard F. Lyon,et al.  An analog electronic cochlea , 1988, IEEE Trans. Acoust. Speech Signal Process..