The estimation of the signal to noise ratio in the planar acoustical holography

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (6) : 96-99.

WAN Hai-bo，ZHU Shi-jian，LOU Jing-jun，DING Shao-chun

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Abstract

The complex pressure signal to noise ratio on the acoustic holography surface has a great influence on the precision of the reconstruction results, however it cannot be measured directly. To solve this problem, the method of two-dimension wavelet analysis was proposed, and the effects of wavelet function and the decompose level were analyzed, which would make a decision for the parameters of the two-dimension wavelet analysis. The proposed method was validated by suing a synthetic sound field created by a point-drive, simply supported plated. The result showed that the two-dimension wavelet analysis for the complex pressure signal to noise ratio was feasible

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PNAH / signal- noise ratio estimation / wavelet analysis / filter window

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WAN Hai-bo，ZHU Shi-jian，LOU Jing-jun，DING Shao-chun. The estimation of the signal to noise ratio in the planar acoustical holography[J]. Journal of Vibration and Shock, 2016, 35(6): 96-99

References

[1] 王冉,陈进,董广明．基于改进HELS方法的局部近场声全息技术研究[J]．振动与冲击,2014,33(10): 157- 161．
WANG Ran，CHEN Jin，DONG Guang-ming． Patch near-field acoustic holography based on modified Helmholtz equation least square method[J]．Journal of Vibration and Shock,2014,33(10):157-161．
[2] 张海滨,蒋伟康,万泉．压缩机噪声的跟踪采样近场声全息实验研究[J]．振动与冲击,2010,29(11)：51-54．
ZHANG Hai-bin，JIANG Wei-kang，WAN Quan. Acoustic field test of a rolling-piston compressor using nearfield acoustic holography combined with track- sampling[J]．Journal of Vibration and Shock,2010,29(11): 51-54．
[3] Nam K Uk, Kim Y H．Errors due to sensor and position mismatch in planar acoustic holography [J]. Journal of the Acoustical Society of America,1999,106(4): 1655- 1665．
[4] Williams E G．Regularization methods for near-field acoustical holography [J]. Journal of the Acoustical Society of America,2001,110(4):1976-1988．
[5] 辛雨,张永斌,毕传兴,等．基于空间傅里叶变换的平面近场声全息中信噪比估计方法研究[J]．计量学报，2010, 31(6):537-542．
XIN Yu，ZHANG Yong-bin，BI Chuan-xing，et al. Analysis and characterization of line edge roughness of nanostructures[J]．ACTA Metrologica Sinica,2010,31(6)：537-542．
[6] 陈心昭,毕传兴．近场声全息技术及其应用[M]．北京：科学出版社,2013．
[7] 程正兴．小波分析与应用实例[M]．西安:西安交通大学出版社,2006．
[8] 张德丰．Matlab小波分析[M]．北京:机械工业出版社，2009．
[9] Williams E G, Maynard J D．Numerical evaluation of the rayleigh integral for planar radiators using the FFT [J]. Journal of the Acoustical Society of America ,1982,72(6): 2020-2030．
[10] 张德俊．近场声全息对振动体及其辐射场的成像[J]．物理学进展,1996,16(3/4):614-623.
ZHANG De-jun．Imaging for vibration mode and radiation field of vibrating object using NAH [J]. Progress in Physics,1996, 16(3/4):614-623.