광대역 전달소음 저감을 위한 지능패널의 개발

초록

A new concept of piezoelectric smart panels for noise reduction in wide band frequencies is proposed and their possibility is experimentally investigated. The proposed panels are based on active and passive methods. They use piezoelectric smart structure technology for active noise reduction at low band frequencies and passive sound absorbing materials for mid-range of noise frequncies. To prove the concept of piezoelectric smart panels, an acoustic measurement experiment was performed. The smart panels exibit a good noise reduction in middle and high frequncy range due to the mass effect of absorbing materials or/and the air gap. The use of piezoelectric smart panel renders noise reduction large at resonance frequency.