A sound-proof structure for a vehicle room is provided with: a partition member (12) that partitions the vehicle room; a sound-absorbing layer (14) that has a plurality of voids therein; an air-impermeable layer (30) that is made of an air-impermeable material; and a compressed fiber layer (32A) that is mainly formed of a compressed fiber aggregate. The bonding strength between the compressed fiber layer (32A) and the air-impermeable layer (30) is lower than the bonding strength between the air-impermeable layer (30) and the sound-absorbing layer (14). Thus, anti-resonance is generated between resonance caused by the resonance transmission phenomenon and resonance caused by the expansion and contraction of the sound-absorbing layer (14) (referring to Figure 10A), thereby improving the insertion loss of the intermediate frequency band and improving the sound-proof performance for the intermediate frequency band sound.
交通工具室防音构造具备划分交通工具室的划分构件(12)、在内部具有多个空隙的吸音层(14)、由不透气性材料构成的不透气层(30)以及将压缩的纤维集合体作为主体地形成的压缩纤维层(32A)。压缩纤维层(32A)和不透气层(30)的接合强度比不透气层(30)和吸音层(14)的接合强度低。由此,通过由共鸣透过现象引起的共振和由吸音层(14)的伸缩引起的共振,而在它们之间产生反共振(参照图10A),能够提高中频带的插入损耗,提高针对中频带的声音的防音性能。
Vehicle room sound-proof structure
交通工具室防音构造
2024-09-03
Patent
Electronic Resource
Chinese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES |
Sound-proof device and vehicle provided with sound-proof device
European Patent Office | 2015
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