| 摘要 |
The present invention relates to a sound absorbent comprising a first cover layer (4), a second cover layer (6) and an intermediate layer (8), said intermediate layer (8) comprising walls (13) delimiting a plurality of cells (12,12a,12b,12c,12d) open in a first end (14) and a second end (16), said cells being arranged adjacent one another, said first open end (14) of said plurality of cells being covered by said first cover layer (4), said second open end (16) of said plurality of cells being covered by said second cover layer (6). In accordance with the invention, said first layer (4) is provided with at least one micro-slit (10) by mechanical machining, the micro-slit (10) extending through said first layer (4), such that sound waves are allowed to penetrate said micro-slit (10) and to enter the first open end (14) of said cell. |
