| 摘要 |
PCT No. PCT/CH79/00156 Sec. 371 Date Aug. 11, 1980 Sec. 102(e) Date Jul. 30, 1980 PCT Filed Dec. 10, 1979 PCT Pub. No. WO80/01184 PCT Pub. Date Jun. 12, 1980.A plate-component (1) which can be used for airborne-sound insulation has chambers (5, 6) filled with a pulverulent or granular, e.g. metallic material, whose chamber walls (2, 3, 4) at least partly are formed by a flexible material. Chambers (5, 6) are small in the vertical direction, but in the horizontal direction can form long channels. This construction not only leads to an increase in the sound insulation of a board joined to component 1 corresponding to an increase in the weight per unit area, but it is also possible to prevent coincidence breakdowns in the range 100-3000 Hz. |
