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．
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), 2015
, 43(10)
: 74
-79,88
.
DOI: 10.3969/j.issn.1000-565X.2015.10.011
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