Generator set using muffler can generally be divided into industrial-type muffler and residential-type muffler, sound-proofing principle of industrial-type muffler is mainly converting the sound energy into heat energy to achieve noise attenuation purpose, sound-proofing principle of residential-type muffler turns to the reflection and interference effect of the produced mismatch acoustic impedance caused by pipeline cross-section and the shape changes to achieve the purpose of attenuating noise.
