Study of micro-perforated tube mufflers with adjustable transmission loss
Study of micro-perforated tube mufflers with adjustable transmission loss
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DOI：
10.1121/1.4831483
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发表时间：
2013-12
影响因子：
2.4
通讯作者：
L. Xiang;S. Zuo;Menghao Zhang;Jiajie Hu;Guo Long
中科院分区：
文献类型：
--
作者：
L. Xiang;S. Zuo;Menghao Zhang;Jiajie Hu;Guo Long
微孔管消声器具有被动消声器和耗散消声器的双重优点。本文提出微孔管长度的变化可以改变微孔管消声器的传输损失行为。本文推导了微孔板的声阻抗，并将其应用于有限元法中，计算了不同微孔管长度消声器的传输损失。然后拟合了最大消声频率与微孔管长度的关系式。这种可调消声器可以有效地控制旋转机械的噪声，因为旋转机械的主要噪声与转速成正比。
Micro-perforated tube muffler has the advantages of both the reactive and dissipative mufflers. The paper proposed that the change of micro-perforated tube length could change the transmission loss behaviors of the micro-perforated tube mufflers. The acoustic impedance of micro-perforated plate was derived in this paper, which was used in the finite element method to calculate the transmission loss of mufflers with various micro-perforated tube lengths. Then, a relation formula of the maximum muffling frequency and the micro-perforated tube length was fitted. This kind of adjustable mufflers could be used efficiently to control the noise of the rotating machines, whose main noises are always proportional to the rotating speed.