| 摘要 |
PROBLEM TO BE SOLVED: To provide, in a double-floor structure where a separate floor layer is provided above a slab at a preferred height, a double-floor structure for reducing impact sound, which enables to suppresses spreading of a floor impact sound especially a heavy impact sound at a low frequency zone of 63 to 125Hz to the minimum without increasing a thickness of the slab. SOLUTION: A supporting buffer member 100 is placed on the slab for supporting another floor which is formed by placing a panel 300 above the slab at a preferred height. The support buffer member 100 includes a support member to support the panel 300, an air-vibration preventing cushion 130 to absorb an impact placed under the support member. The support member includes a support bolt 120 adjustable in its height according to how it is tightened and a support nut 125. A hollow part is provided in a central axis of the support bolt 120, so that the hollow part is exposed when the support nut 125 is tightened. COPYRIGHT: (C)2005,JPO&NCIPI
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