When the indoor or the surrounding environment on the equipment generated by the noise requirements, in addition to centrifugal fan vibration reduction noise treatment, but also do muffler, sound treatment.

The use of noise shields on the fan, the fan sound shields according to the type and size of the fan, to make a variety of shapes of the shell. It is made up of multi-piece standard or non-standard soundproof panels, and can also be made of integral cover. Cover the fan out of the outlet and access door, all other parts of the closed. To remove the heat dissipated when the motor is running, install the exhaust pipe at the top of the housing.

The sound shield can be made of steel and flame retardant FRP.

The structure of the steel soundproof plate is mainly used in the method of internal suction, the principle of action is when the fan running the vibration wave and the high-speed movement of the air flow through the perforated plate, the glass cloth is gradually superfine glass wool The pores are absorbed, and the galvanized outer plate can also prevent the sound waves from being completely absorbed and the protective cover is in vitro.

Glass fiber reinforced plastic enclosures of its muffler material is the use of non-metallic multi-layer composite structure formed by the combination of soft and hard sound insulation sound insulation material arranged alternately, the sound waves can act on different materials, resulting in reflection and absorption to achieve sound insulation effect.