Vibration and acoustic radiation control of a panel attached to piezoelectric shunt oscillators.

In this work, the vibration of a single-panel attached with piezoelectric shunt oscillators (PAPS) and its acoustic radiation are modeled theoretically. The vibration equations are derived based on the principle of minimum potential energy and acoustic impedance of PAPS. The sound absorption coefficient (SAC), energy loss coefficient (ELC), and transmission loss(TL) of PAPS are calculated based on the acoustic impedance and displacement response of PAPS. Then theoretical results are compared with those of finite element simulation, and the results are relatively consistent. Finally, sound absorption and isolation experiments of PAPS at non-eigenfrequency near (1,1) modal are conducted in a standing wave tube. [ABSTRACT FROM AUTHOR]