Architecture for acoustic protection of cover zone of car, has fibrous material layer whose face is coated with partial sealing layer containing latex, where weight of sealing layer is defined such that ply has resistance to air passage

摘要

The architecture (1) has a flexible absorption and porous ply (3) associated in tensioned state below a cover (2) of a car and spaced apart from the cover to create air space (4) between the cover and the ply. The ply comprises a fibrous material layer (5) with weight ranging between 80 to 250 grams per meter square. A face of the material layer is coated with partial sealing layer (10) containing latex. Weight of the sealing layer is defined between 30 to 100 grams per meter square such that the ply has resistance to air passage ranging between 500 to 2500 Newton second per cubic meter.