Structure borne noise control of a clamped panel using shunt damping system

This study was conducted to predict the noise radiated from a vibrating structure, with a piezoelectric material being attached to a clamped panel structure to reduce radiated noise. To predict the structure-borne noise in the panel using piezoelectric materials, a motion equation of the piezoelectric shunt damping system, including the electromechanical system, was derived using a Lagrange equation. The structure born noise was reduced using noise control on the panel structure through the design of a shunt circuit for piezoelectric materials. In particular, the target frequency was selected based on the sound quality determined by experimental results for controlling the structure borne noise. To reduce the structure-borne noise of a vibration structure, the piezoelectric shunt damping system was designed using the optimal design of circuit elements and the design of experiments method. The position for attaching the piezoelectric system was determined for noise control of the (3,1) mode of the radiated noise. Finally, through the attachment of the piezoelectric shunt damping system, the noise was reduced by 5 dB at the target frequency experimentally.