Metal sound-absorbing (perforated) punching panels are made by punching metal coils according to a certain hole diameter and density, and then pressing them into metal sheets of various shapes. They are mainly used for film and television theaters, sports venues, libraries, etc. for sound silencing requirements. Roof base for higher locations. Shanghai Tengwei Company can customize sound-absorbing punched panels with various hole diameters and densities according to customers' sound-absorbing requirements. Sound absorption is the phenomenon of energy loss after sound waves hit the surface of sound-absorbing materials. Sound absorption can reduce indoor sound pressure levels and also reduce noise pollution.