| 摘要 |
The structure, designed to adhere to the principle of mass-spring-mass, has each of the masses in the form of a rigid U-section panel (1,2) covered on the inside by a layer of mineral wool (3) and fixed mechanically to components (6,7) of the building, e.g. on either side of framework components. The acoustic attenuation index of the structure is over 50 dB(A), and preferably over 60 dB(A). At least one of the panels is of solid and another of perforated metal sheet, and the panel ends are designed to be fitted together to form flush surfaces (10,11). In addition, they are fastened to the building components by plain or acoustic spacers (12). |
