消声器是一种允许气流通过而使声能衰减的装置。它装在气流通道上,便能够降低空气动力性噪声。消声器的种类很多,型式也是多种多样。根据消声原理大致可分阻性和抗性两大基本类型。阻性消声器的原理是借助装置在管道上的吸声材料吸收声能的作用,使沿管道传播的声波能量随距离而衰减。阻性消声器的优点是能在较宽的中高频范围内消声,而且消声量较大,缺点是在高温、油污、水蒸气 A muffler is a device that allows the flow of air to attenuate the sound energy. Installed in the air passage, it reduces aerodynamic noise. There are many types of mufflers, the type is also varied. According to the muffler principle can be divided into two basic types of resistance and resistance. The principle of the resistive muffler is to absorb the acoustic energy by the sound absorption material on the pipeline of the device so as to attenuate the acoustic energy propagating along the pipeline with distance. Resistive muffler has the advantage of a wide range of high-frequency noise cancellation, and a large amount of muffler, the disadvantage is the high temperature, oil, water vapor