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서대원(D.W.Seo),홍정혁(J.H.Hong),오재응(J.E.Oh),이홍권(H.K.Lee),김상헌(S.H.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
This study put a focus on the identification of coupling effects between acoustic modes in the rectangular enclosure with a flexible plate and the vibration of plate. Analysis of structural -acoustic coupled system leads to the investigation of the interior and exterior sound field characteristics of an acoustically loaded rectangular cavity. To reduce the radiated noise. measured admittance of foamed aluminum is applied to the bottom wall in the cavity. Analytical results due to the foamed alumimum in the cavity showed the sound attenuation over 5dB in the interested frequency range over the fundamental acoustic natural frequency.<br/>