Abstract
Accelerated psychoacoustical masking effects with level for simple tone maskers of higher frequency tones [Wegel and Lane, Phys. Rev. 23, 226–285 (1924); Duifhuis, J. Acoust. Soc. Am, 67, 914–927 (1980)] have clear correlates with nonlinear suppression and excitation phenomena in auditory nerve and basilar membrane responses [Abbas and Sachs, J. Acoust. Soc. Am. 59, 112–122 (1976); Patuzzi, Sellick, and Johnstone, Hear. Res. 13, 19–27 (1984); Robles et al., J. Acoust. Soc. Am. 80, 1364–1384 (1986)]. A signal processing model of basilar membrane response is presented that quantifies basilar membrane mechanics as two nonlinearly interacting filter responses: (i) a sensitive, narrow‐band compresslye response responsible for the tips of cochlear suppression and excitation tuning curves; and (ii) and insensitive, lowpass linearlike response responsible for the low‐frequency tails of tuning curves. Dual filter processing along with mutual suppression between the filters, described by the model, allows conceptualization of known psychoacoustics in terms of competing cochlear mechanical responses. Detailed model accounts of data and methods for estimating model parameters will be presented.
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