| 摘要 |
Absorbent noise-reducing box element intended to be applied against a supporting rigid surface 3, of the type comprising: - a rigid external panel 1, having a plurality of through-orifices; - an insulating and absorbent fibrous layer 4, placed between the panel 1 and the supporting surface 3 characterised in that the external panel 1 has at each of its lateral edges a projection 6 made by moulding which is perpendicular to the general plane of the panel 1 and the length of which corresponds substantially to the thickness of the fibrous layer 4. <IMAGE>
|
