... curing. It has many functions, for example : sound-absorbing ,sound insulation ,flame retardant , moistureproof and mouldproof , ... and many colors can be for selection How to identify the quality of the acoustic board ... than ordinary sponge, (how to identify good and bad sponge,if it's to press down hard, ... .And our aim is to attain win-win cooperation. Acoustic foam materials,new design sound proof