MA Yuanfeng1  CHEN Ke'an1  SHI Fang2

(1 College of Marine, Northwestern Polytechnical University  Xi'an 710072)

(2 Chinese Flight Test Establishment, Yanliang Xi'an  710089)

Received Oct. 22, 2008

Revised Jan. 14, 2009

Abstract In the acoustic target recognition, the auditory feature's advantages compare with the traditional target feature are studies by using the cascade compressive Gamma-Chrip (CcGC) filter model, which has been used to describe the auditory system function. It is concluded from the theoretical analysis and simulations that the auditory feature has better effects as the Signal-to-Noise Ratio (SNR) is reduced. Finally, the mechanism of the noise suppression in the cochlea is analyzed by simulations, and the results show that the Equivalent Rectangular Bandwidth rate (ERB-rate) expression in the frequency domain and the compression of cochlea are essential to the noise suppression. 　

PACS numbers: 43.66, 43.60, 43.72