On the nature of two-tone aural nonlinearity

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Abstract
The literature on 2-tone nonlinearity was reviewed. An ad hoc model of human auditory nonlinearity was described, which can account for several of the features of the psychophysical data on various 2-tone nonlinearities and 2-tone suppression. The 2 basic components of the model are a nonlinearity which is a series combination of the classical power-series and compressive p-law nonlinearities and an intensity-dependent (nonlinear) filtering scheme. The conceptual model proposed here not only describes the psychophysical data accurately, but also offers possible explanations for some of the apparent discrepancies between psychophysical and physiological data on 2-tone nonlinearities.

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