【摘要】 提出了用压电材料进行主动吸声的方法。用压电陶瓷作为主动吸声系统中的吸声材料,通过等间距布置于压电陶瓷正前方的两个麦克风传感器,检测出平面入射声波与反射声波,利用压电陶瓷的压电性能,在压电陶瓷上加电压使得反射声波为零,从而达到主动吸声的目的。最后对不同频率入射的声波用matlab语言进行了仿真,仿真结果表明文中所提方法的可行性。更多还原

【Abstract】 An active absorption method is posed. in this paper, in which a piece of piezoelectric ceramic is used as the absorption material. Two microphones with equal distance are placed in the front of the piezoelectric ceramic in order to measure the incidence plane wave and the reflected wave, the voltage is applied on the surface of the piezoelectric ceramic in order to make the reflected wave be zero using the adaptive controlling. At last, emulation is carried out with plane wave, good absorption effect is attained.更多还原