Signal processor for and an auditory prosthesis having spectral

Details Signal processor for and an auditory prosthesis having spectral Signal processor for and an auditory prosthesis having spectral

1987-03-13

1989-04-25

Jaworski, Francis

Surgery

Truss

Pad

A61N 100, H05G 0000

Patent

active

048237957

ABSTRACT:
An auditory prosthesis using and a signal processor for an electrical input signal designed to represent sound to a person. A plurality of filters each passing a different center frequency is operatively coupled to receive the electrical input signal. Each of the plurality filters is less than critically damped providing an electrical output signal whch has an impulse response which is oscillatory. Thus, the plurality of filters generate a plurality of electrical signals which selectively replicate the temporal nerve discharge pattern of individually located auditory nerve fibers within the cochlea of the person.

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Oppenheim and Schafer, "Digital Signal Processing", Prentice-Hall, Englewood Cliffs, N.J., 1975, p. 132.
Sachs and Young, "Encoding of Steady-State Vowels in the Auditory Nerve: Representation in Terms of Discharge Rate", 66 Journal of the Acoustical Society of America.
Walker and Dent, "Functional Description of a Prototype Portable Four Channel Analog Processor for an Auditory Prosthesis", Appendix B and Setting the Four-Channel Analog Processor for an Arbitrary Sine-Wave I nput, Appendix C (1986).
Young and Sachs, "Representation of Steady-State Vowels in the Temporal Aspects of the Discharge Patterns of Populations of Auditory-Nerve Fibers", 66 Journal of the Acoustical Society of America, pp. 1381-1403 (1979).

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