| 摘要 |
The concrete panel or constructional component is in two parts (1,2) separate from each other and joined together by reinforcing members. - Apertures (6) are formed in one or both, leading to a layer of sound-absorbent material (5) on the inside. The reinforcing members can be in the form of a latticework beam (4), and in addition to the sound-absorbent material a further layer (7) of heat-insulating synthetic material can be combined with it, extending over the entire surface of the parts, whereas the absorbent material extends only over the area contg. the apertures.
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