The present invention is characterized by comprising: a first structure (10A) in which the bonding strength between the air-impermeable layer (30) and the compressed fiber layer (32) is relatively weak; and a second structure (10B) in which the bonding strength between the air-impermeable layer (30) and the compressed fiber layer (32) is higher than the bonding strength between the first structure (10A). A sound-proof structure for a vehicle room is provided with a second structure (10B) having excellent sound-proof performance in a high-frequency band (1000 Hz or more), and a first structure (10A) having improved sound-proof performance in a middle-frequency band (200 Hz to 630 Hz) by suppressing a reduction in insertion loss in the middle-frequency band. Therefore, the sound-proof performance of the whole vehicle room can be improved.
特征在于,具有不透气层(30)和压缩纤维层(32)的接合强度相对较弱的第1构造(10A)以及不透气层(30)和压缩纤维层(32)的接合强度比第1构造(10A)的接合强度高的第2构造(10B)。交通工具室防音构造具备高频带(1000Hz以上)的防音性能优异的第2构造(10B)和抑制中频带(200Hz~630Hz)的插入损耗的降低从而提高中频带的防音性能的第1构造(10A)。由此能够提高交通工具室整体的防音性能。
Vehicle room sound-proof structure
交通工具室防音构造
2024-09-06
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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