Product Details: The reactive silencers reflect some sound waves back to the direction of the sound source through sudden changes in acoustic characteristics inside the pipeline, in order to achieve the purpose of noise reduction. They are mainly applicable for reducing LF and LF-MF noises, e.g. LF-MF blow-off noise of equipment, such as air compressors, diesel engines and automotive engines. Their structural forms generally include expansion type (also known as expanding type), resonance type, micro-perforated plate type, interference type, electronic type, etc. Their noise reduction and resistance requirements can be customized according to customers and the noise reduction capacity is 10-30dB (A).