Punching is a simple film. Perforated membrane material is a simple membrane material that is punched twice on the soft film ceiling membrane material. The hole diameter and hole spacing can be customized. Using metal film punching to make shapes can not only achieve the effect of metal materials, but is also safe and low-cost. Commonly used and personalized places. The punched soft film material has a very superior sound-absorbing effect and is a good sound-absorbing material. It is used in large conference rooms, karaoke halls, concert halls and other places.