WHITE SOUNDPROOF MATERIAL,white soundproof material,soungproof material,soundproof insulation material,soundproof materials for walls.1,feature sound insulation effect is good.2,function FR,Rohs,svhc.3,uses Noise reduction4,Industry Standard GB,BS-5852 or TB1175,Maker Daye Tengfei Sponge/foamAbsorbing the incoming acoustic energy of the..