| 摘要 |
PROBLEM TO BE SOLVED: To provide a soundproofing structure of a structural body using a sandwich panel facilitating the construction, reducing manhour, the manufactur ing cost, and the weight of the whole body, and maximizing the car inside space. SOLUTION: The structural body 22 is constituted of the sandwich panel 29 having a core 28 with a lot of clearances, between two faceplates 25 and 26 so that a lightweight and highly rigid body structure is provided. A vibration damping material 27 is provided between the two faceplates near a connecting part 24 of the body structure 22 so as to suppress the vibration of a part near the connecting part of the respective faceplates. If the vibration is transmitted from an underframe 23 to the body structure 22, the vibration of the respective faceplates 25 and 26 becomes small in a large area of the body structure 22 so as to prevent the vibration of the respective faceplates 25 and 26 from being a generation source of the noise.
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