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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/8380

Title: A computational model of co-modulation masking release
Authors: Unoki, Masashi
Akagi, Masato
Issue Date: 1998-02-06
Publisher: 北陸先端科学技術大学院大学情報科学研究科
Magazine name: Research report (School of Information Science, Japan Advanced Institute of Science and Technology)
Volume: IS-RR-98-0006P
Start page: 1
End page: 23
Abstract: This paper proposes a computational model of co-modulation masking release (CMR). It concists of two models, our auditory segregation model (model A) and the power spectrum model of masking (model B), and a selection process that selects one of their results. Model A extracts a sinusoidal signal using the outputs of multiple auditory filters and model B extracts a sinusoidal signal using the output of a single auditory filter. For both models, simulations similar to Hall et al.'s demonstrations were carried out. Simulation stimuli consisted of two types of noise masker, bandpassed random noise and AM bandpassed random noise. It was found that in model A, the signal threshold decrease as the masker bandwidth increases for AM bandpassed noise. In contract, in model B, the signal threshold increases as the masker bandwidth increases up to 1 ERB and then it remains constant for both noises. The selection process selects the sinusoidal with the lowest signal threshold from the two extracted signals. As a result, the signal threshold of the pure tone extracted using the proposed model shows the similar properties to Hall et al.'s demonstrations. The maximum amount of CMR in the proposed model is about 8 dB.
URI: http://hdl.handle.net/10119/8380
Material Type: publisher
Appears in Collections:IS-RR-1998

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