Research on the Performance of Sound Absorption Coating Based on Piezoelectric Shunt Damping

The traditional sound-absorbing structure converts sound energy into heat energy through internal friction of the damping material to be absorbed in order to achieve the purpose of reducing sound energy. This paper proposes a piezoelectric shunt damping sound absorption control scheme based on the positive piezoelectric effect of piezoelectric materials. The external sound is connected to the composite material formed by piezoelectric ceramics and rubber by an external circuit system formed by resistors, inductances, and capacitors. It can be converted into electric energy, and the sound wave energy is consumed by resistance heating. This solution can effectively improve the low-frequency sound absorption performance, thereby realizing wide-band reflected sound control.