Abstract
Noise and vibration control are the one of important issues. A sound insulation cover which covers a sound source is very useful for the noise reduction. The purpose of the present study is to investigate the acoustic characteristic of a sound insulation cover using acoustic/structure coupled analysis. It is clearly that sound pressure distributions inside and outside cover changed obviously according to the input frequency of a sound source. Several peaks of the sound pressure level were observed and these peaks were depended on the natural frequency and the resonance frequency of the insulation cover. Detail characteristic of the acoustic resonance phenomena was investigated and the mode of acoustic resonance changed by the sound source position.
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