双元低频扬声器相控技术

Research on phase control technology of dual low frequency loudspeaker

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 5160W 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.