TY - JOUR
AU - Li, Shande
AB - Abstract The potential of piezoelectric transducer (PZT) and loudspeaker shunt damping technologies on improving noise insulation efficiency of double-wall structure at low frequencies is investigated. A semi-active circuit of negative capacitance is introduced to the PZT to achieve noise reduction at all structural resonance frequencies and a passive circuit of purely resistance is introduced to the shunt loudspeaker to add the damping effect of the cavity at cavity dominated frequency. A coupled model, characterizing the interaction among the PZT patched plates, air cavity and shunted loudspeakers, is developed based on modal analysis methods. Numerical results show that PZT shunt damping or the loudspeaker shunt damping is effective to improve the performance at some certain resonant frequencies and the combined PZT/loudspeaker shunt damping model can achieve noise reduction at all coupled and uncoupled structural-acoustic mode frequencies. Finally, experiments are carried out in a laboratory set-up to verify the numerical results roughly.
TI - Improving Low Frequency Performance of Double-Wall Structure Using Piezoelectric Transducer/Loudspeaker Shunt Damping Technologies
JF - "Journal of Low Frequency Noise, Vibration and Active Control"
DO - 10.1260/0263-0923.31.3.175
DA - 2012-09-01
UR - https://www.deepdyve.com/lp/sage/improving-low-frequency-performance-of-double-wall-structure-using-aEB62w2qzi
VL - 31
IS - 3
DP - DeepDyve
ER -