In this paper, we define the problem of segregating two acoustic sources as ``segregating a mixed signal into the original signal components, where the mixed signal is composed of two signals generated by any two acoustic sources''. The essential idea of the proposed model is that (a) the observed signal is decomposed into its frequency components by an auditory filterbank (frequency decomposition), (b) components of each signal are segregated from the decomposed components, and (c) components of each signal are grouped by a grouping process into each signal. The auditory segregation model is shown in Fig. 1. This process is formulated as follows.
