Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Improved Noise Minimum Statistics Estimation Algorithm for Using in a Speech-Passing Noise-Rejecting Headset | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 395048 11 pages doi 2010 395048 Research Article Improved Noise Minimum Statistics Estimation Algorithm for Using in a Speech-Passing Noise-Rejecting Headset Saeed Seyedtabaee and Hamze Moazami Goodarzi Department of Electrical Engineering Engineering Faculty Shahed University . Box 18155 159 Tehran Iran Correspondence should be addressed to Saeed Seyedtabaee gstabaii@ Received 23 August 2009 Revised 7 March 2010 Accepted 8 May 2010 Academic Editor Igor Djurovic Copyright 2010 S. Seyedtabaee and H. Moazami Goodarzi. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. This paper deals with configuration of an algorithm to be used in a speech-passing angle grinder noise-canceling headset. Angle grinder noise is annoying and interrupts ordinary oral communication. Meaning that low SNR noisy condition is ahead. Since variation in angle grinder working condition changes noise statistics the noise will be nonstationary with possible jumps in its power. Studies are conducted for picking an appropriate algorithm. A modified version of the well-known spectral subtraction shows superior performance against alternate methods. Noise estimation is calculated through a multi-band fast adapting scheme. The algorithm is adapted very quickly to the non-stationary noise environment while inflecting minimum musical noise and speech distortion on the processed signal. Objective and subjective measures illustrating the performance of the proposed method are introduced. 1. Introduction Industrial site noises jeopardize workers health condition. To alleviate the risk a passive protecting headset may be worn. It gives good attenuation of ambient noise in the upper frequency band and some how medium protection in
