Muffler: The equipment is used to reduce noise through pipes, ducts or open voice transmission, and don't stop media transmission.

Structure plate muffler: It is applicable to the duct of  civil engineering structure to eliminate the noise of the ventilation and air conditioning system, and muffler is installed on the open or not open environment, in the form of on-site assembly.

Reasonable structure, enough strength and stiffness, horizontal or vertical installation available, reasonable volume, light weight, moistureproof and anticorrosive, fire prevention,  simple craft, easy to clean, to adapt to the different air volume and air pressure and environment temperature and humidity requirements.Muffler framework and component with galvanized treatment  for anti-corrosion.

Structure plate muffler is unit cell chip structure, without embedded parts. Muffler noise elimination slice thickness  is equal to flow channel width, namely into the wind area percentage is 50%, and its use 1/2 silencing slice thickness on both sides of the wall. For installation in exposure to the wind hole muffler, sound-absorbing material structure of the surface protection should be not less than 0.8 mm thick of stainless steel (SUS316) perforated plate, silencing piece at the ends of the dome also should use should not less than 0.8 mm thick stainless steel plate.Sound-absorbing material to protect the panel flatness of perforation rate should not be more than 2/1000 (mm), perforations, edge requirement level off, the surface should be smooth and no burr, no dirt or iron mold, orifice surrounding the minimum distance is not less than 5 mm;Package sound-absorbing material glass cloth should be plain non-alkali glass cloth.Muffler sealing material use the materials with stable physical and chemical performance high temperature, anti-aging, non-corrosive rubber products that don't pollute .