| 二维矢量声强的误差分析 |
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| 引用本文： | 周广林,郭秀艳. 二维矢量声强的误差分析[J]. 黑龙江科技学院学报, 2009, 19(5): 348-351 |
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| 作者姓名： | 周广林 郭秀艳 |
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| 作者单位： | 黑龙江科技学院,机械工程学院,哈尔滨,150027 |
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| 基金项目： | 黑龙江省研究生创新科研项目 |
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| 摘 要： | 为便于识别和定位平面内噪声源，依据双传声器互谱声强法原理，建立二维矢量声强探头的物理模型，推导了二维声强的计算公式，分别在单极子和偶极子声场条件下，利用该探头测量二维声强及定位误差。结果表明：对于单板子声场，频率小于4600Hz时，x,y方向和总声强理论误差均不超过1．5dB；频率小于1600Hz时，定位误差均小于0．01m。对于偶极子声场，测点距y轴小于0．01m、频率小于1300Hz时，定位误差较大，均大于0．01m；测点距Y轴0．6～2．0m、频率小于1600Hz时，定位误差均小于0．01m，能够满足工程上的需求。
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| 关 键 词： | 二维声强 传声器 声强误差 定位误差 |
Error analysis of two-dimensional sound intensity |
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| ZHOU Guanglin,GUO Xiuyan. Error analysis of two-dimensional sound intensity[J]. Journal of Heilongjiang Institute of Science and Technology, 2009, 19(5): 348-351 |
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| Authors: | ZHOU Guanglin GUO Xiuyan |
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| Affiliation: | ZHOU Guanglin,GUO Xiuyan(College of Mechanical Engineering,Heilongjiang Institute of Science and Technology,Harbin 150027,China) |
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| Abstract: | Aimed at facilitating recognition and location of noise source,this paper proposes the physical model of the new two-dimensional sound intensity probe based on the two-microphone cross-spectral method and offers algorithms for two dimensional sound intensity.Depending on the monopole sound field and dipole sound field,the paper gives the size error and the location error of two-dimensional sound intensity,as determined by using the probe.The results show that monopole sound field,with frequency below 4600Hz... |
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| Keywords: | two-dimensional sound intensity microphones size errors location errors |
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