| 调制声源的近场声全息分析 |
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| 引用本文： | 毛荣富, 朱海潮, 杜向华, 朱海鹏. 调制声源的近场声全息分析[J]. 声学学报, 2011, 36(4): 412-418. DOI: 10.15949/j.cnki.0371-0025.2011.04.012 |
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| 作者姓名： | 毛荣富 朱海潮 杜向华 朱海鹏 |
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| 作者单位： | 1.海军工程大学振动与噪声研究所 武汉 430033 |
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| 摘 要： | 为了解决传统近场声全息技术在重建调制声源声场时无法显示出调制成分的问题,先通过Hilbert变换对调制信号的声场进行解调处理,将调制信号和载波信号分离开来,然后再对调制成分进行普通的重建分析,由此提出了基于Hilbert变换的调制声源近场声全息分析方法。文中的数值仿真与试验研究均表明此方法可以有效地完成调制声源的重建分析。
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| 收稿时间： | 2010-02-22 |
| 修稿时间： | 2010-07-03 |
Near-field acoustic holography analysis of modulated sound source |
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| MAO Rongfu, ZHU Haichao, DU Xianghua, ZHU Haipeng. Near-field acoustic holography analysis of modulated sound source[J]. ACTA ACUSTICA, 2011, 36(4): 412-418. DOI: 10.15949/j.cnki.0371-0025.2011.04.012 |
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| Authors: | MAO Rongfu ZHU Haichao DU Xianghua ZHU Haipeng |
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| Affiliation: | 1.Institute of Noise and Vibration, Naval University of Engineering Wuhan 430033 |
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| Abstract: | When conventional near-field acoustic holography(NAH)technique is applied to sound field induced by modulated signal,the modulating frequency can not be revealed by the reconstructed results.To solve the problem, an NAH analysis procedure for modulated sound source was proposed.Firstly,Hilbert transform was introduced to demodulate the signal,and then modulating component was reconstructed by NAH technique.Both numerical simulation and experiment results demonstrate that accurate reconstruction analysis could be obtained by the proposed method. |
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