Type of silencer
There are many types of mufflers, but they can be divided into six main types based on their muffler mechanisms, namely resistive mufflers, resistant mufflers, impedance composite mufflers, micro-perforated plate mufflers, and small holes. Silencer and active silencer.
Resistive silencer
The main use of porous sound-absorbing materials to reduce noise. The sound-absorbing material is fixed on the inner wall of the air flow channel or arranged in a pipe in a certain manner to form a resistive muffler. When the sound wave enters the resistive muffler, a part of the sound energy rubs in the pores of the porous material and is converted into heat energy to be dissipated, which weakens the sound wave passing through the muffler. Resistive mufflers are like purely resistive electrical circuits, and sound-absorbing materials are similar to resistors. Therefore, people call this type of silencer a resistive silencer. The resistive muffler has a good effect on the middle and high frequencies and has a poor effect on the low frequencies.
