Abstract:A Perforated plate is used as an acoustic absorption material for compressors and acoustic barriers for roads and railways.There are many studies of the perforated plate from the aspect of the acoustic absorption. In this paper, the effect of set positions of the perforated plate on the acoustic natural frequency is considered with the TMM and the experiment. And the reason why the analytical result due to the TMM and the equation of Melling are in good agreement is clarified. From the analytical and experimen… Show more
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