The auditory segregation model shown in Fig. 1 consists of three parts: (a) auditory filterbank, (b) separation, and (c) grouping. The auditory filterbank is constructed using a gammatone filter as an ``analyzing wavelet.'' The separation block uses physical constraints related to heuristic regularities (ii) and (iv). The grouping block uses physical constraints related to heuristic regularities (i) and (iii), and signal reconstruction in the grouping block is done with the inverse wavelet transform.