Comparison and Numerical Analysis of Measurement Accuracy of Two
Three-Dimensional Sound Intensity Arrays

doi:10.3969/j.issn.1000-565X.2015.10.011

Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (10): 74-79,88.doi: 10.3969/j.issn.1000-565X.2015.10.011

• Architecture & Civil Engineering • Previous Articles Next Articles

Comparison and Numerical Analysis of Measurement Accuracy of Two Three-Dimensional Sound Intensity Arrays

Wang Hong-wei^1，2 Zhang Long¹

1． School of Architecture，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou 510640，Guangdong，China

Received:2015-01-13 Revised:2015-04-07 Online:2015-10-25 Published:2015-09-06
Contact: 王红卫( 1975-) ，男，博士，副教授，主要从事建筑和环境声学研究 E-mail:wanghw@scut.edu.cn
About author:王红卫( 1975-) ，男，博士，副教授，主要从事建筑和环境声学研究
Supported by:
Supported by the National Natural Sciene Foundation of China( 51278198) and the National Study Fund of China ( 201308440043)

Abstract

Abstract: In this paper，the measurement accuracies of the sound intensity arrays of the tetrahedral and six-microphone arrangements are numerically predicted，and the measured amplitude and angle biases of the two arrays are compared． Then，the numerical results are verified by a test in an anechoic room． The results show that ( 1) the measured amplitude errors of the two arrays increase with the frequency，and they are both greater than 2 dB when the frequency is 6 kHz and the sound intensity array radius is less than 0. 012 7 m; ( 2) the tetrahedron is significantly superior to the six microphone in terms of the angle bias，and the angle bias of the tetrahedron is less than 1° when kd ( the product of the wave number and the sound intensity array radius) is less than 1. 6; and ( 3) the tetrahedral sound intensity array reduces the requirement for the hardware system of the sound intensity measurement and can be used in relevant architecture acoustical measurements at the intermediate frequency stage．

Key words: three-dimensional sound intensity, numerical calculation, direction judgment, measurement accuracy

Wang Hong-wei Zhang Long. Comparison and Numerical Analysis of Measurement Accuracy of Two Three-Dimensional Sound Intensity Arrays[J]. Journal of South China University of Technology (Natural Science Edition), 2015, 43(10): 74-79,88.

References

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Comparison and Numerical Analysis of Measurement Accuracy of Two Three-Dimensional Sound Intensity Arrays

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