| 声强传感器特性对扫描声强法确定声源声功率的影响 |
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| 引用本文： | 毕传兴,陈剑,周广林,陈心昭.声强传感器特性对扫描声强法确定声源声功率的影响[J].计量学报,2003,24(3):216-220. |
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| 作者姓名： | 毕传兴 陈剑 周广林 陈心昭 |
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| 作者单位： | 合肥工业大学动态测试中心,安徽合肥,230009 |
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| 基金项目： | 国家自然科学基金 ( 5 0 2 75 0 44 )，安徽省自然科学基金 ( 0 0 47418)，高等学校博士学科点专项科研基金 ( 2 0 0 2 0 3 5 90 0 5 ) |
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| 摘 要： | 文中以典型的矩形测量面方波扫描路径为例 ,分析了扫描声强法测量声源声功率时双传声器互谱声强传感器的有限差分近似误差、近场效应误差、相位不匹配误差与声源频率、测量面离声源的距离以及声强传感器两传声器间的间隔之间的关系。结果表明根据声源频率合理地选取参数可以减小声强传感器所带来的误差 ,从而为保证扫描声强法测量声源声功率测量准确度提供了依据。
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| 关 键 词： | 计量学 声功率测量 扫描声强法 声强传感器 误差分析 |
| 文章编号： | 1000-1158(2003)03-0216-05 |
| 修稿时间： | 2002年5月28日 |
Influence of the Two-Microphone Cross-Spectral Sound Intensity Probe on the Determination of Sound Power by Scanning |
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| BI Chuan xing,CHEN Jian,ZHOU Guang lin,CHEN Xin zhao.Influence of the Two-Microphone Cross-Spectral Sound Intensity Probe on the Determination of Sound Power by Scanning[J].Acta Metrologica Sinica,2003,24(3):216-220. |
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| Authors: | BI Chuan xing CHEN Jian ZHOU Guang lin CHEN Xin zhao |
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| Abstract: | The relationships between errors of finite difference approximation, near field effect and instrumentation phase mismatch and frequency of the source, the distance between the scanning surface and the source and the space length of the two microphones are established with the improved model determining sound power using the orthogonal scanning path on the rectangle measurement surface. The results show that the errors resulted from the two microphone sound intensity probe can be reduced as the parameters are chosen rationally. And it ensures the measurement accuracy of the sound power measurement by the scanning acoustic intensity method. |
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| Keywords: | Metrology Sound power measurement Scanning acoustic intensity method Sound intensity probe Error analysis |
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