The selection of air duct silencers can be learned

Air duct silencerIt also belongs to a type of silencer, which has many types. There are resistance type silencers, which absorb sound energy and reduce noise through sound-absorbing materials. Generally, micro perforated plate silencers belong to this type and are generally used to eliminate high and medium frequency noise. However, due to its structure, it is not suitable for high temperature, high humidity, and high speed situations.
There is also an anti noise muffler, which suppresses noise by changing the cross-section. The commonly used sound-absorbing static pressure boxes are based on this principle. Generally reduce mid to low frequency noise. There are no specific requirements for the wind system. There is also an impedance composite muffler, which combines the structural principles of both. It can eliminate low, medium, and high frequency noise.

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Common plate flange fire damperhttp://www.retech.cnproducts-show/5579.html