| 摘要 |
A wall element for the sound-insulating interior lining of a transport device, comprising at least one sandwich element, at least one insulation package and at least one absorber plane element. The sandwich element comprises at least one core layer, a first cover layer and a second cover layer, wherein the first cover layer and the second cover layer are each arranged on one side of the core layer. At least the first or the second cover layer is a microperforated layer; the sandwich element possesses a shear rigidity that is adjusted in such a way that the sandwich element comprises one or several coincidence boundary frequencies that are determined by the shear rigidity, which coincidence boundary frequencies are outside the frequency range that dominates the noise in the interior of the cabin; and the shear rigidity of the sandwich element at the same time is sufficient for said sandwich element to be used as an interior lining. Sound-insulating interior lining according to the aspects according to the invention provides adequate sound insulation also in the lower frequency range of below 500 Hz, without increasing the weight of the interior lining when compared to the weight of conventional interior linings.
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