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首页> 外文期刊>International Journal of Naval Architecture and Ocean Engineering >A simple formula for insertion loss prediction of large acoustical enclosures using statistical energy analysis method
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A simple formula for insertion loss prediction of large acoustical enclosures using statistical energy analysis method

机译：统计能量分析法预测大型隔音罩插入损耗的简单公式

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ABSTRACT Insertion loss prediction of large acoustical enclosures using Statistical Energy Analysis (SEA) method is presented. The SEA model consists of three elements: sound field inside the enclosure, vibration energy of the enclosure panel, and sound field outside the enclosure. It is assumed that the space surrounding the enclosure is sufficiently large so that there is no energy flow from the outside to the wall panel or to air cavity inside the enclosure. The comparison of the predicted insertion loss to the measured data for typical large acoustical enclosures shows good agreements. It is found that if the critical frequency of the wall panel falls above the frequency region of interest, insertion loss is dominated by the sound transmission loss of the wall panel and averaged sound absorption coefficient inside the enclosure. However, if the critical frequency of the wall panel falls into the frequency region of interest, acoustic power from the sound radiation by the wall panel must be added to the acoustic power from transmission through the panel.
机译：摘要提出了使用统计能量分析（SEA）方法预测大型隔音罩的插入损耗的方法。 SEA模型包含三个元素：机柜内部的声场，机柜面板的振动能量以及机柜外部的声场。假定围绕外壳的空间足够大，以至没有能量从外部流向墙板或外壳内部的气腔。对于典型的大型隔音罩，预计的插入损耗与测量数据的比较显示出良好的一致性。可以发现，如果壁板的临界频率降到感兴趣的频率区域之上，则插入损耗将由壁板的传声损耗和外壳内部的平均吸声系数决定。但是，如果墙板的临界频率落入感兴趣的频率范围，则墙板的声音辐射产生的声功率必须与通过墙板传输的声功率相加。

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