| 摘要 |
<p>A baffle for sound absorbers intended for rectangular ventilation ducts. The baffle (10) has a rectangular shape when seen sideways on and also when seen in vertical cross-section transversely to the longitudinal direction and includes sound absorbing insulating material (20, 21) supported by a frame structure or casing (14, 15). The baffle is characterised in that it includes at least two juxtaposed, generally parallelepipedic baffle-parts (16) which are mutually spaced at least at one end thereof and which contain sound absorbing insulating material (20) and said insulation-material supporting frame structure or casing (14, 15). There is provided at each outer end of the baffle (10) a respective vertically extending edge-piece (12 and 13) which connect and hold together said baffle-parts (16). At least one edge-piece (12) at the outer end of the baffle (10) which meets the ventilation air has an air-flow deflecting shape. The baffle-parts (16) can be given a predetermined position in relation to one another, by appropriate selection of the edge-pieces (12), so as to form spaces (17) between two mutually adjacent baffle-parts (16). The baffle-parts (16) are conveniently disposed obliquely in relation to one another, so that the baffle (10) will be thickest at that end which is to be positioned to meet the air flow in the ventilation duct. At least one space (17) between the baffle-parts (16) shall be filled with an appropriate material (21). <IMAGE></p> |
