基于声压-振速测量的单面声场分离技术

张永斌; 徐亮; 毕传兴; 陈心昭

doi:10.3321/j.issn:1000-3290.2009.12.039

物理学报

基于声压-振速测量的单面声场分离技术

, , ,

张永斌, 徐亮, 毕传兴, 陈心昭. 2009: 基于声压-振速测量的单面声场分离技术, 物理学报, 58(12): 8364-8371. doi: 10.3321/j.issn:1000-3290.2009.12.039

引用本文:

张永斌, 徐亮, 毕传兴, 陈心昭. 2009: 基于声压-振速测量的单面声场分离技术, 物理学报, 58(12): 8364-8371. doi: 10.3321/j.issn:1000-3290.2009.12.039

Zhang Yong-Bin, Xu Liang, Bi Chuan-Xing, Chen Xin-Zhao. 2009: Sound field separation technique based on single surface measurement using pressure-velocity transducers, Acta Physica Sinica, 58(12): 8364-8371. doi: 10.3321/j.issn:1000-3290.2009.12.039

Citation:

Zhang Yong-Bin, Xu Liang, Bi Chuan-Xing, Chen Xin-Zhao. 2009: Sound field separation technique based on single surface measurement using pressure-velocity transducers, Acta Physica Sinica, 58(12): 8364-8371. doi: 10.3321/j.issn:1000-3290.2009.12.039

基于声压-振速测量的单面声场分离技术

合肥工业大学噪声振动工程研究所,合肥,230009

Sound field separation technique based on single surface measurement using pressure-velocity transducers

摘要: 在近场声全息技术的基础上,研究了基于声压-质点振速测量的单面声场分离技术.分析了现有基于Fourier变换的单面声场分离技术中的奇异性问题,并应用波数域谱平均法提出了去除奇异性的修正声场分离公式.为改善分离效果,减小由于Fourier变换引起的卷绕误差等因素的影响,基于统计最优近场声全息提出了一种新的单面声场分离方法.通过仿真分析对各种单面声场分离方法做了比较,并用Mieroflown公司的声强探头做了基于声压.振速测量的单面声场分离实验研究,验证了提出的修正公式和基于统计最优单面声场分离方法的正确性和有效性.
- 声场分离 /
- 近场声全息 /
- 统计最优 /
- Fourier变换
Abstract: The sound field separation technique based on single surface measurement is investigated in this paper. A modified separation formula based on the spatial Fourier transform is presented to overcome the inherent singularity of the current single surface separation technique. However due to the wraparound error associated with fast Fourier transform (FFT) , the accuracy of separation technique based on FFT is not satisfactory and a novel separation method based on the statistically optimized nearfield acoustic holography is proposed to improve the separation. The simulations as well as experiments carried out with the p-u intensity probe produced by Microflown demonstrate the validity of the proposed modified formula and the effectiveness of the new separation method.

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基于声压-振速测量的单面声场分离技术

合肥工业大学噪声振动工程研究所,合肥,230009

关键词:

摘要: 在近场声全息技术的基础上,研究了基于声压-质点振速测量的单面声场分离技术.分析了现有基于Fourier变换的单面声场分离技术中的奇异性问题,并应用波数域谱平均法提出了去除奇异性的修正声场分离公式.为改善分离效果,减小由于Fourier变换引起的卷绕误差等因素的影响,基于统计最优近场声全息提出了一种新的单面声场分离方法.通过仿真分析对各种单面声场分离方法做了比较,并用Mieroflown公司的声强探头做了基于声压.振速测量的单面声场分离实验研究,验证了提出的修正公式和基于统计最优单面声场分离方法的正确性和有效性.

English Abstract

Sound field separation technique based on single surface measurement using pressure-velocity transducers

合肥工业大学噪声振动工程研究所,合肥,230009

Keywords:

Abstract: The sound field separation technique based on single surface measurement is investigated in this paper. A modified separation formula based on the spatial Fourier transform is presented to overcome the inherent singularity of the current single surface separation technique. However due to the wraparound error associated with fast Fourier transform (FFT) , the accuracy of separation technique based on FFT is not satisfactory and a novel separation method based on the statistically optimized nearfield acoustic holography is proposed to improve the separation. The simulations as well as experiments carried out with the p-u intensity probe produced by Microflown demonstrate the validity of the proposed modified formula and the effectiveness of the new separation method.

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基于声压-振速测量的单面声场分离技术

Sound field separation technique based on single surface measurement using pressure-velocity transducers

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基于声压-振速测量的单面声场分离技术

English Abstract

Sound field separation technique based on single surface measurement using pressure-velocity transducers

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