Implementation of a Nonlinear Wave-Digital-Filter Cochlear Model

  • David H. Friedman
Conference paper
Part of the Lecture Notes in Biomathematics book series (LNBM, volume 87)

Abstract

Research on the physiology of hearing over the past decade strongly suggests that wave propagation in the cochlea is affected by an active nonlinear regeneration mechanism. One published nonlinear cochlear modeling study (Deng and Geisler, 1987) presents results (Figure 9 of the reference) linking the nonlinearity to an apparent enhancement of speech sounds in broadband noise, in comparison to equivalent results without the nonlinearity. If such an effect can be verified and understood in general terms, it would be of significant value for improving intelligibility in speech recognition and in aids to the deaf, and perhaps for other signal recovery applications as well.

Keywords

Outer Hair Cell Basilar Membrane Tectorial Membrane Analog Network Network Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Allen, J. B. (1980) Cochlear micromechanics — a physical model of transduction. J. Acoust. Soc. Am. 68(6), 1660–1670.Google Scholar
  2. Deng, L. and Geisler, C. D. (1987) A composite auditory model for processing speech sounds. J. Acoust. Soc. Am. 82(6), 2001–2012.Google Scholar
  3. Fettweis, A. (1986) Wave digital filters: theory and practice. Proc. IEEE 74(2) , 270–327.Google Scholar
  4. Kim, D. O. (1986) A review of nonlinear and active cochlear models. In: Peripheral Auditory Mechanisms (Eds: J. B. Allen, et. al.) Springer–Verlag, 239–249. Neely, S. T. and Kim, D. O. (1986) A model for active elements in cochlear mechanics. J. Acoust. Soc. Am. 79(5), 1472–1480.Google Scholar
  5. Strube, H. W. (1985) A computationally efficient basilar-membrane model. Acustica, 58, 207–214.Google Scholar
  6. Strube, H. W. (1986) Cochleare Mikromechanik und aktive Prozesse. In: Fortschritte der Akustik, DAGA ’86 Proceedings.Google Scholar
  7. Zwicker, E. (1981) Dependence of level and phase of the (2FI — F2) cancellation tone on frequency range, frequency difference, level of primaries and subject. J. Acoust. Soc. Am. 70(5) , 1277–1288.Google Scholar
  8. Zwislocki, J. J. and Kletsky. E. J. (1979) Tectorial membrane: a possible effect on frequency analysis in the cochlea. Science 204, 639–641.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • David H. Friedman
    • 1
  1. 1.The MITRE CorporationBedfordUSA

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