| 听觉模型输出谱特征在声目标识别中的应用 |
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| 引用本文： | 马元锋,陈克安,王娜,郑文.听觉模型输出谱特征在声目标识别中的应用[J].声学学报,2009,34(2):142-150. |
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| 作者姓名： | 马元锋 陈克安 王娜 郑文 |
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| 作者单位： | 西北工业大学 航海学院环境工程系 西安 710072 |
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| 基金项目： | 国家自然科学基金，西北工业大学基础研究基金 |
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| 摘 要： | 利用模拟人耳声信号处理过程的CcGC滤波器组模型,研究了听觉特征应用于声目标识别相比传统特征的优势。结果表明:当信号的信噪比下降时,听觉特征逐渐表现出更好的性能,体现了听觉系统优异的抗噪声能力。随后,本文从CcGC滤波器组模型所反映的听觉系统四个主要特性入手,通过仿真实验研究了耳蜗抑制噪声的机理,结果表明听觉系统的临界带划分和非线性压缩在耳蜗抑制噪声中起着关键的作用。
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| 收稿时间： | 2007-12-12 |
Application of auditory spectrum-based features into acoustic target recognition |
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| MA Yuanfeng,CHEN Kean,WANG Na,ZHENG Wen.Application of auditory spectrum-based features into acoustic target recognition[J].Acta Acustica,2009,34(2):142-150. |
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| Authors: | MA Yuanfeng CHEN Kean WANG Na ZHENG Wen |
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| Institution: | College of Marine, Northwestern Polytechnical University Xi'an 710072 |
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| Abstract: | In the acoustic target recognition,the auditory feature's advantages compared with the traditional feature are studied by using the cascade compressive gammachrip (CcGC) filter model,which has been used to describe auditory system function.It is concluded from theoretical analysis and simulations that the auditory feature has better effects as the Signal-to-Noise Ratio (SNR) is reduced.At last,the mechanism of noise suppression in cochlea is analyzed by simulations,and it is shown that Equivalent Rectangular Bandwidth (ERB) expression in frequency domain and the compression of cochlea are essential for cochlea noise suppression. |
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