Simultaneous Use of Piezoelectric Ceramics as Sensor and Actuator for Through-plate Sound Transmission Control.

Abstract

The most interesting aspect of piezoelectric material is that it can be used as both a sensor and an actuator. In this study, we attempted to use it as a sensor and actuator simultaneously. In order to implement this method successfully, we had to solve two problems. The first was to input the control signal to the simultanetously used piezoelectric element. The second problem was to separate the signals; the sensor signal due to the bending vibration and the input control command signal. This problem was resolved by introducing a dummy piezoelectric element. In this paper, the effectiveness of the simultaneous use for a control system is demonstrated by the substantial reduction of the sound pressure level in experimental results of the active control.