| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound proof body for a vehicle and a silencer for a vehicle in which a noise is sufficiently shielded across a wide frequency range, capable of utilizing a lamination structure of a thin film layer and a porous layer, for lighter weight, with no transmission resonance phenomenon accompanied which is apt to occur in connection with a low frequency region of noise.SOLUTION: A dash silencer DS is configured by stacking a one side layer 40, a middle side layer 50, and the other side layer 60. Here, the middle side layer 50 is formed as a non-ventilation thin film layer. The other side layer 60 is formed as a porous layer having a plurality of opening parts.SELECTED DRAWING: Figure 2 |
