用sound absorbing material造句子，“sound absorbing material”造句

For example, specification will describe that ducts may be made of galvanized-iron. When galvanized-iron is used, it may be lined with sound absorbing material, to reduce noise from movement of air.

A new type of porous sound absorbing material was made from super-strength gypsum and glass fiber.

The nonwoven fabric (20) of the sound absorbing material (10) as vehicle exterior equipment may consist of two types of nonwoven fabrics (22,24) superimposed on each other.