基于压电材料的主动吸声降噪方法研究

提出了用压电材料进行主动吸声的方法。用压电材料作为主动吸声系统中的吸声材料,通过等间距布置于压电材料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,利用压电材料的压电性能,在压电材料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。

Study on Active Noise Control Using Piezoelectric Material

An active absorption method using piezoelectric material is proposed in this paper. In this method, a piezoelectric ceramic is used as the absorption material in the active absorption system. Two microphones are placed in the front of the piezoelectric ceramic with equal distance from it to measure the incidence plane wave and the reflecting wave. The voltage is applied on the surface of the piezoelectric ceramic in order to eliminate the reflection wave. Finally, simulation of the active absorption control is carried out by means of the MATLAB code for the incidence plane wave with different frequencies. Results show that the proposed method is effective and feasible.