PMID: 3745662Jul 1, 1986Paper

Suppression and (2f1-f2)-difference tones in a nonlinear cochlear preprocessing model with active feedback

The Journal of the Acoustical Society of America
E Zwicker

Abstract

The two nonlinear effects of two-tone suppression and of (2f1-f2)-difference tone creation are measured in a hardware model which consists of 90 sections containing nonlinear feedback loops. The basic data are the level and phase distributions along the 90 sections produced by single tones in the linear passive system which are almost identical to those produced in the nonlinear active system at high levels. Enhancement is created at medium and low input levels resulting in more strongly peaked level-place patterns. Two-tone suppression is, therefore, described as a "de-enhancement" which is produced by the gain reduction in the saturating nonlinearity of the feedback loop in consequence of increasing input levels (that of the feedback loop in consequence of increasing input levels (that of the suppressor as well!). Characteristics of suppression are given in normalized form. The creation of (2f1-f2)-difference tones is based on the same nonlinear effects. In each section, difference-tone wavelets are created which travel--changing level and phase thereby--to their characteristic place, where they add up to a vector sum corresponding to the audible difference tone. In case of cancellation, the vector sum has to be compensated b...Continue Reading

Citations

Sep 1, 1989·Hearing Research·K I McAnally, M B Calford
Oct 1, 1989·Hearing Research·R B PatuzziB M Johnstone
Mar 1, 1990·Hearing Research·C D GeislerB M Johnstone
Jul 2, 2003·Medical Engineering & Physics·Antanas StasiunasKerstin Malmqvist
Apr 28, 2001·The Journal of the Acoustical Society of America·M Pienkowski, H Kunov
May 17, 2011·The Journal of the Acoustical Society of America·Joyce Rodriguez, Stephen T Neely
Mar 19, 2008·The Journal of the Acoustical Society of America·Douglas H KeefeMichael P Gorga
Oct 19, 2013·Physiological Reviews·Paul AvanChristine Petit
Apr 1, 1993·British Journal of Audiology·H P Zenner
Jun 28, 2001·Physiological Reviews·L Robles, M A Ruggero
Feb 1, 1992·Journal of Speech and Hearing Research·M E ChertoffR Goldstein

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