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Noise Analysis and Protection Based on Auditory Features

JIANG Yi;ZU Yuanyuan;Department of Electronic Engineering,Tsinghua University;The Quartermaster Equipment Research Institute,General Logistics Department;  
Noise is an important factor in causing hearing damage. Most noise analysis focuses on the characteristics of the noise source,and few consider noise protection needs. From the perception of the human auditory system,Gammatone filter bank is used to decompose the sound in frequency domain for non-uniform multi-sub bands decomposition; through spectrogram,sub-band energy and channel-related characteristics,the auditory feature of the noise signal is calculated quantitatively and the noise protection recommendations is put forward. Analyzing the noise auditory feature,then noise separation is an effective method to hearing protection.
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