Vibration and noise control study of ER based cylindrical cavity with high frequency excitation: experimental results

Excited by a sound source inside, the dynamic and acoustic characteristics of a sandwich cylindrical cavity embedded with electrorheological fluid are studied. experimentally. The experimental results show that even in high frequency range, by tuning the properties of ER material with external electric field, dynamic characteristics and responses of the cylindrical structure could still be changed and controlled apparently, and these modifications are frequency dependent and relative with structural working condition,. However, in the experimental frequency range, the effect of ER fluid on sound isolation performance could almost be neglected, which means that ER materials are not available for the isolation of high frequency noise.