Introduction to the types of muffler
The muffler can be divided into three types: resistive muffler, resistive muffler and impedance compound muffler according to the principle and structure of sound elimination.
1. Resistant muffler Resistant muffler is an expansion room, resonance room and other muffler units formed by pipes, partitions and other components inside. Sound waves are reflected and interfered during propagation, reducing the sound energy to achieve the purpose of sound attenuation. Resistant mufflers have limited muffling frequency bands, and usually have good muffling effects for low and mid-frequency bands, but poor muffling effects for high frequencies. Resistant mufflers are mostly used for trucks.
2. The resistive muffler is a muffler that is filled with sound-absorbing materials around the pipe through which the internal exhaust gas passes to absorb sound energy to achieve sound attenuation. It has a good muffling effect on medium and high frequencies, and it is rarely used as a car exhaust muffler. It is usually used in combination with a resistant muffler.
3. Impedance composite muffler is a muffler composed of a combination of a resistant muffler unit and a sound-absorbing material. It has the common characteristics of a resistant and resistive muffler. It has a good muffling effect for low, medium and high frequency noise.
