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首页> 外文会议>International Congress and Exposition on Noise Control Engineering >The Acoustic Characteristics of Cylindrical Chamber Silencers with a Concentrically Extended Inlet and Outlet
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The Acoustic Characteristics of Cylindrical Chamber Silencers with a Concentrically Extended Inlet and Outlet

机译：具有同心延伸的入口和出口的圆柱形腔室消音器的声学特性

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Cylindrical chamber silencers with an extended inlet and outlet are extensively used in many application fields to reduce the propagated noise in ducts. The basic attenuation effectiveness in the low frequency region can be explained by the reactive wave action inside the expansion chamber associated with the geometric configurations of the inlet and outlet locations, and the area expansion of the jacket. In this study, an acoustic analysis is carried out for a concentric extended pipe inserted into a simple expansion chamber. An algebraic equation is derived by using the eigenfunction expansion and orthogonality principle in which the acoustic pressures and particle velocities defined on each subdivided surface are expressed by the separable coordinates. By using the proposed analytical method, transmission losses are predicted for several configurations of the concentric extended systems and they agree very well with experimental results.
机译：具有延长入口和出口的圆柱形腔室消声器广泛用于许多应用领域，以减少管道中的传播噪声。 低频区域中的基本衰减效能通过与入口和出口位置的几何构造相关的膨胀室内的反应波动，以及夹套的面积膨胀。 在该研究中，对插入简单膨胀室的同心延伸管进行声学分析。 通过使用特征函数膨胀和正交原理来得出代数方程，其中在每个细分的表面上限定的声学压力和颗粒速度由可分离的坐标表示。 通过采用所提出的分析方法，预测传输损耗对于同心扩展系统的若干配置，它们与实验结果非常吻合。

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