FAN SILENCER : How does a fan silencer work? If an overwhelming sound makes us feel irritated from a large form, it should stop immediately. The need for a square tube model should be required. The overwhelmingness of the general public is to reduce its character. For example, in our living room, the fan is smoothed and the public will have a square-shaped cardboard in front of it. It is necessary for the insulation material. The backup item is of solidity. It is capable of reducing excessive noise. You have to put too many separators to reduce the sound .