SOUNDPROOF STRUCTURE FOR SOLID WOOD, AND ITS CONSTRUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide structure of high soundproofing and vibration control effects while using a solid wood. SOLUTION: The solid wood 5 used as a surface plate is disposed on a slab through a joist 3. A cushioning material 4 is provided between the slab 1 and the joist 3, and a sound insulating material 6 is provided between the joist 3 and the solid wood 5. A sound absorbing material 8 is arranged in an air layer 7 between the slab 1 and the solid wood 5. Further, a moisture-proof sheet 2 can be arranged between the slab 1 and the cushioning material 4, and another plate can be arranged between the sound insulating material 6 and the joist 3. Since the sound insulating material 6 having vibration control performance and high surface density is used under the solid wood 5, individual propagation sound generated to the surface of the solid wood 5 is reduced. Further, the joists 3 are arranged at prescribed spaces underneath, and the air layer 7 is provided to reduce air propagation sound. The cushioning material 4 is further provided under the joist 3 to suppress the transmission of vibrational energy from the floor surface to the slab 1.