It is composed of the microperforated steel muffler of the array. Filled soundproof sponge among the tubes, use steel plate as cover plates on the end of the tubes, use aluminum alloy to push the plates. The steel shell has the function of protection and sound insulation, built-in steel frame is the force bearing structure.
Compare with other noise control products, it has the advantages of light weight, short length, small volume, and attractive shape.