A hybrid-computer simulation of the Peterson-Bogert model of the cochlea is reported. The present simulation is shown to be a good representation of the original model except near 10 kHz. The output of the model at one point has many similarities to recent experimental data. In particular, the low-frequency slope of the amplitude function is +6 dB/oct and the high-frequency slope is steeply negative. The phase function shows a break from linearity near the resonance frequency and approaches +90° at low frequencies. Quantitative discrepancies between model and experimental data exist, but they could be appreciably reduced by changes in parameter values. Incorporating nonlinear membrane damping in the simulation produces nonlinear effects similar to those observed in the cochlea. With increasing intensity, the displacement peak becomes relatively reduced and occurs at a somewhat lower frequency.
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Hubbard et al. (1972) studied this question.