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Dissipative muffler is mainly used to reduce the noise of the porous sound absorption material. The acoustic material is fixed on the inner wall of the air passage and arranged in a certain way in a certain way. When sound waves enter the resistive muffler, part of the sound energy in the pores of the porous material friction and converted into heat energy dissipated and the attenuation of the muffler acoustic. The resistive muffler is like pure electric resistance circuit, and the sound absorption material is similar to the resistance. Therefore, people put this kind of muffler is called resistive muffler. The effectiveness of the anti noise muffler is bad for the middle and high frequency noise, and the effect is poor.

Resistance muffler is caused by mutations in the interface of the tube and ventricular combination, it seems to be an acoustic filter, and similar electrical filter, each with a tube or chamber is a mesh filter, tube air quality is equivalent to that of the electrical inductance and resistance, said the sound quality and resistance. Capacitance of the air in the chamber volume is equal to the electrical, called acoustic paramagnetic. And similar electrical filters, each with a tube chamber has its own inherent frequency. When contain various frequency components of the sound waves into the first tube, only in certain frequencies near the first mesh frequencies of sound waves to the mesh arrived a short second export, and also some frequency sound waves may not through the mesh. Only in the chamber to back reflection, therefore, we call this a sound wave filtering function for structure for acoustic filter. Select the appropriate pipe and combination. It can filter out certain frequency components of noise, so as to achieve the purpose of eliminating the. The resistant muffler is suitable for eliminating medium and low frequency noise.