调制声场声源定位技术研究  

Sound source location technology of a modulated sound field

作　　者：张顺[1,2] 朱海潮[1,2] 毛荣富[1,2] 

机构地区：[1]海军工程大学振动与噪声研究所,武汉430033 [2]船舶振动噪声重点实验室,武汉430033

出　　处：《振动与冲击》2014年第10期119-126,共8页Journal of Vibration and Shock

摘　　要：为提高调制声场特征提取的准确性,减小噪声对全息重建结果影响,提出复解析小波变换的调制声源近场声全息分析方法。利用复解析小波变换自适应分析能力,对调制声场声压信号进行处理,实现调制信号与噪声信号分离,再对调制成分进行统计最优近场声全息重建分析。利用仿真信号及音响实验分析验证表明,该方法能准确识别、定位调制声源,计算量小,抑制噪声能力强,且全息重建精度高。In order to improve the precision of feature extraction of a modulated sound field and reduce the influence of noise on sound holography reconstruction results, the near-field acoustic holography （NAH ） analysis technology based on complex analytical wavelet transformation was proposed. Firstly, complex analytical wavelet transformation was induced to process sound signals and pick-up the modulated components,and then the modulated components were reconstructed with SONAH technique.The analysis results of simulated signals and actual tests demonstrated that the proposed method can be used to exactly locate a modulated sound source and reduce the computation complexity,it has a better anti-noise performance and a higher accuracy of acoustic holography reconstruction.

关 键 词：调制 复解析小波变换 统计最优近场声全息 

分 类 号：TB53[理学—物理] O429[理学—声学]