天花吊顶、隔声垫、减震垫、地板 地毯及各种铺地隔声减震材料等 Ceiling, sound insulation pad, damping pad, floor, carpet and various sound insulation and damping materials | GB/T 19889.6-2005 ISO 10140-3:2010(EN&BS EN) ASTM E492-09、AS ISO 140.6-2006 | 撞击声隔声 Impact Sound Insulation 冲击绝缘等级 Classification for determination of impact insulation class IIC |