The exhaust muffler has six different types, such as dissipative muffler, reactive muffler, composited muffler, micro-perforated panel muffler, small hole muffler, and active muffler.
The noise level is from 9dB to 45dB. The shape of the muffler can be designed in box-type, cylinder, and oval cross section cylinder according to different space and noise level requirement. The material can be stainless steel or carbon steel. Finally it will spray high temperature paint of 600°.