| 摘要 |
A sound insulating trim part with at least one area with predominantly sound absorbing characteristics (absorbing area), at least one other area with acoustic mass-spring characteristics (insulating area), characterised in that the mass layer of the absorbing area consists of the same porous fibrous layer as the absorbing area, in the insulating area adjusted to a dynamic Young's modulus (Pa) of at least (96·AW·t) with AW area weight (g/m 2 ), and t thickness (mm) of the fibrous layer, and at least an air impermeable thin barrier layer between the fibrous layer and the decoupling layer. |
