| 摘要 |
<p>The invention relates to an acoustic construction element comprising sound insulating cavities of which at least part have a first portion (4), which is situated closest to the external surface (3) of the element and at least a second portion (5) having a maximum internal width (6) which is larger than the smallest width of said first portion (4) of the cavity. At least some of said cavities have different internal volume, of which preferably the portion of the cavities beyond the first portion have a circular or oval shape. Said construction element further comprises preferably cavities (e, f, h) having a substantially constant width over their entire depth. The invention further relates to the use and the method of manufacturing said construction elements.</p> |
