Introduction to resistive muffler
Resistive muffler is a muffler that uses sound waves to propagate in a porous sound absorbing material or sound absorbing structure, which is dissipated by friction to convert sound energy into heat energy, so that the noise propagating along the pipeline is attenuated with distance, thereby achieving the purpose of eliminating noise. .
A muffler that absorbs sound energy by installing a sound absorbing material or a sound absorbing structure on the inner wall or the passage space. It has a small pressure drop to the airflow and a good sound-absorbing effect on the intermediate frequency and high-frequency sound waves, so it is widely used. According to different usage requirements, there are different structural forms. For example, in a general air conditioning system, a glass wool structure having a thickness of about 2.5 cm can be laid on the inner wall of the pipe. For the exhaust port of a large wind tunnel or jet engine test workshop, a structure in which parallel stacked sound absorbing panels or a spatial array of sound absorbing cylinders are installed in the pipeline may be employed. The disadvantage is that in the high temperature, water vapor and gas corrosive to the sound absorbing material, the service life is short, and the noise reduction effect on the low frequency noise is poor.