| 摘要 |
The present invention relates to a sound absorber (10) having baffles (11, 12, 13) for rectangular ventilation ducts (17). The sound absorber includes two side-baffles (11, 12), one or more centre baffles (13), a top part (14) and a bottom part (15). The baffles (11, 12, 13) stand on the bottom part (15) and are covered by the top part (14) and joined to said top and bottom part (14, 15) such that the baffles (11, 12, 13) form together with said top and bottom parts (14, 15) a coherent unit. The outer side-surfaces of the side-baffles (11, 12) and the top and bottom parts (13, 14) together form the absorber casing or cowling. The baffles (11, 12, 13) are preferably removably fitted in the top and bottom parts (14, 15). The outer surfaces of the side-baffles (11, 12) are conveniently covered with the same material as that used with the top and bottom parts (14, 15) preferably galvanised metal sheet. The side-baffles (11, 12) can be adapted for in-drawn connection of the sound absorber (10) to the ventilation duct (17). <IMAGE> |
