从平面波作用下三维声强阵列的理论推导出发，通过声压、质点振速估计和声强谱计算，比较了正四面体传声器和六传声器的幅值误差和方向性误差，并在全消声室中对数值仿真的结果进行验证． 研究结果表明:随着频率增加，幅值误差呈指数式增长，4 kHz范围内两种传声器的幅值误差均小于 0． 5dB，满足精度要求，且正四面体传声器略优于六传声器;在平面波作用下正四面体传声器的方向性精度明显优于六传声器，当频率为8kHz时六传声器的角度偏差已接近 6°，而正四面体传声器角度偏差仅为 1°，且全频域范围内角度偏差增长缓慢．

On the basis of the theoretical derivation of three-dimension sound intensity arrays in plane wave,firstly,the sound pressure and the particle velocity are estimated,and the sound intensity spectrum is calculated.Then,a comparison of amplitude bias and directional bias is made between a tetrahedral microphones system and a six-mi- crophone system.Finally,the numerical simulation results are verified through experiments in an anechoic cham- ber.It is found that (1) the magnitude bias expands exponentially as frequency increases; (2) the amplitude bia- ses of the two systems are both less than 0.5dB within the range from 0Hz to 4kHz,which means that the systems both meet the accuracy requirements; (3) the tetrahedral microphones system is superior to the six-microphone sys- tem; and (4) the directional bias of six-microphone system is close to 6° at a frequency of 8kHz,while that of tetra- hedral approach is only 1° and increases slowly in the whole frequency domain,which means that the tetrahedral microphones system exhibits higher directional accuracy than the six-microphone system.