Reduction Effects of Correlated Measurement Noise in Near-field Acoustic Holography Based on Bispectrum

被引：0
作者：
Du Xiang-hua [1 ]
Zhu Hai-chao [1 ]
Mao Rong-fu [1 ]
Zhu Hai-peng [1 ]
机构：
[1] Naval Univ Engn, Inst Noise & Vibrat, Wuhan, Peoples R China
来源：
2011 6TH IEEE CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS (ICIEA) | 2011年
关键词：
near-field acoustic holography; bispectrum; reconstruction accuracy; correlated noise;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the practical measurement of near-field acoustic holography (NAH), measured signals on holographic grids and reference point are inevitably contaminated by some noises. These noises will be amplified in the process of NAH back reconstruction, and source reconstruction accuracy degrades. As we can assumed that the measurement noise obeys Gaussian distribution, a method based on bispectrum is presented in this paper to overcome the shortage of convention cross spectrum based NAH. The point source model simulation shows that the influence of Gaussian correlated noise can be removed effectively, and the reconstruction accuracy is improved
引用
收藏
页码：136 / 138
页数：3
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