指向性可控的低频声源是研制高强度次声波武器的基础。为解决低频声波的波束发散难以定向发射问题，采用相位控制方法，研制了用于控制扬声器相位的移相电路，实验以2台峰值功率达5 160 W的低音喇叭对象，在100 Hz测试了双元相控阵的辐射声场。仿真和实验结果均表明，通过该电路可实现低频声波的单向发射。
A low-frequency sound source with controllable directivity is the basis for the development of high-intensity infrasonic weapons. In order to solve the problem that the beam divergence of low-frequency sound waves is difficult to directional emission, a phase shifting circuit for controlling the phase of the speaker is developed by the phase control method. The experiment used two woofer objects with a peak power of 5160 W to test the radiated sound field of the binary phased array at 100 Hz. Both simulation and experimental results show that the unidirectional emission of low-frequency sound waves can be achieved by this circuit.
2020,42(6): 149-152 收稿日期：2018-10-23
DOI：10.3404/j.issn.1672-7649.2020.06.030
分类号：TN722
作者简介：李睿(1994-),男,硕士研究生,研究方向为电力电子系统的电磁兼容
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