调制声源的统计最优近场声全息技术研究

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 253-256,.

论文

调制声源的统计最优近场声全息技术研究

朱海鹏; 朱海潮; 毛荣富; 杜向华

作者信息 +

Statistically optimal near-field acoustic holography of modulated sound source

ZHU Hai-peng; ZHU Hai-chao; MAO Rong-fu; DU Xiang-hua

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文章历史 +

摘要

常规近场声全息技术分析调制声源产生的声场得到的结果无法正确识别和分析声源的调制成分。本文展开了调制声源的统计最优近场声全息分析，具体方法为先通过Hilbert变换解调调制声场的声压信号，提取出调制成分，然后再对调制成分进行统计最优近场声全息分析重建调制声源。通过扬声器实验和空压机调制声源识别实验证明了该方法在工程应用上的有效性。

Abstract

The common near-field acoustic holography (NAH) can not be utilized to analyze modulating component of the modulated sound source. In this paper, a method to analyses the modulated sound source with statistically optimal near-field acoustic holography (SONAH) technology was applied, that is, Hilbert transform was introduced to demodulate the sound signal and pick-up the modulating component, and then the modulating component was reconstructed by SONAH technology. Its effectiveness in engineering was proved by the loudspeaker experiment and the air compressor experiment.

导出引用

朱海鹏;朱海潮;毛荣富;杜向华. 调制声源的统计最优近场声全息技术研究[J]. 振动与冲击, 2011, 30(12): 253-256,

ZHU Hai-peng;ZHU Hai-chao;MAO Rong-fu;DU Xiang-hua. Statistically optimal near-field acoustic holography of modulated sound source[J]. Journal of Vibration and Shock, 2011, 30(12): 253-256,