... sound absorbing material, 2.automobile sound deadener, 3 vehicle sound damping 4.automobile sound deadener car sound absorbing material, automobile sound deadener, vehicle sound ... span is more than twenty years.Water-proof, sound absorbing, heat protection and fire retardant. Thinker alumium ... the object, like partitions, ducts, doors, bins, panels, and so forth in railroad cars, buses, automobiles, ...