Nonlinear processing in auditory system

* This work is supported by national sciences fund, No. 69635020 Abstract It is no doubt that our auditory system is a nonlinear processing system in speech signal perception. In this paper many aspects of nonlinear processing are discussed. First Nonlinear frequency resolution, that is nonlinear or nonuniform sampling theory in auditory system, second, nonlinear combination of different frequency components, such as two tone suppression and lateral inhibition. At last , we mainly focus on nonlinear intensity discrimination, which is important in forward masking effect, we give our model and experimental result.