| 摘要 |
<p>The cladding, incorporates porous material which may or may not form a hollow air space in front of the wall surface, as used for sound wave absorption in industrial hangar-type structures, studios etc. The material is made up from two layers (2, 3) with differing flow resistance in the face of air flowing through. The layer (2) closest to the interior has a lower flow resistance than the one (3) on the wall side. The latter may be in contact with the wall (5), and the other layer in contact with itself; or a hollow air space (1, 6) may be formed between one layer and the wall, and/or between the two layers. The layer on the room side may be in the form of wedges.</p> |
