| 摘要 |
PROBLEM TO BE SOLVED: To provide a girder soundproof cover for preventing amplification of a low frequency sound propagated from a bridge fixing part by effectively reducing an audible sound radiated from a bridge structure. SOLUTION: This girder soundproof cover 1 is composed of two plates of a footing surface 2 and a decorative surface 3, and an outer frame 4b for forming a space between the plates 2 and 3; and is constituted for reducing the amplification of low frequency vibration by connecting in the longitudinal sectional direction in one or more places between the plates by a rib 4a. COPYRIGHT: (C)2007,JPO&INPIT
|
