PROBLEM TO BE SOLVED: To provide a soundproof body for vehicle and a silencer for vehicle having three-layer stack structure interposing a sound insulation layer on an intermediate side between each sound absorption layer on one side and the other side, the volume density of each portion in the sound absorption layer on the other side corresponding to each portion with mutually different thickness in the three-layer stack structure being different, and thereby sound absorption performance and sound insulation performance can be properly exhibited throughout the whole three-layer stack structure.SOLUTION: A dash silencer DS is constituted by stacking a sound absorption layer 40 on one side, a sound insulation layer 50 on an intermediate side, and a sound absorption layer 60 on the other side. Here, the volume density of a portion in the sound absorption layer 60 on the other side corresponding to a thin portion of the dash silencer DS is set to become large and the volume density of a portion in the sound absorption layer 60 on the other side corresponding to a thick portion of the dash silencer DS is set to become small.SELECTED DRAWING: Figure 3

    【課題】一側及び他側の各吸音層の間に中側遮音層を介装してなる3層積層構造を有し、当該3層積層構造において互いに厚さを異にする各部位に対する他側吸音層の各対応部位の体積密度を異にして、3層積層構造の全体にわたり、吸音性能及び遮音性能を適切に発揮するようにしてなる車両用防音体及び車両用サイレンサーを提供する。【解決手段】ダッシュサイレンサーDSは、一側吸音層40、中側遮音層50及び他側吸音層60を積層して構成されている。ここで、他側吸音層60のうちダッシュサイレンサーDSの薄肉部位に対する対応部位の体積密度が大きくなるように設定されるとともに、他側吸音層60のうちダッシュサイレンサーDSの厚肉部位に対する対応部位の体積密度が小さくなるように設定されている。【選択図】図3


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    Title :

    SOUNDPROOF BODY FOR VEHICLE AND SILENCER FOR VEHICLE


    Additional title:

    車両用防音体及び車両用サイレンサー


    Contributors:

    Publication date :

    2018-01-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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