To provide a vehicle interior soundproof structure that can improve soundproof performance in a vehicle interior as a whole.SOLUTION: A vehicle interior soundproof structure comprises a first area A1 which is an area where strength of adhesion between a non-ventilation layer 30 and a compressed fiber layer 32 is relatively weak and a second area A2 where the strength of the adhesion therebetween is relatively strong. Places, where soundproof performance in a high-frequency band (1000 Hz or higher) made more excellent by a structure 10B in the second area A2, are mixed with places, where insertion loss in a middle-frequency band (200 Hz-630 Hz) is suppressed from decreasing and soundproof performance in the middle-frequency band is improved by a structure 10A in the first area A1, so that soundproof performance in a vehicle interior as a whole can be improved.SELECTED DRAWING: Figure 8
【課題】乗物室全体としての防音性能を向上させることが可能な乗物室防音構造を提供する。【解決手段】非通気層30と圧縮繊維層32との接着強度が相対的に弱い領域である第1領域A1と、相対的に高い領域である第2領域A2と、を有することを特徴とする。第2領域A2の構造10Bによって、高周波数帯域(1000Hz以上)の防音性能に優れた箇所と、第1領域A1の構造10Aによって、中周波数帯域(200Hz~630Hz)の挿入損失の低下を抑えて中周波数帯域の防音性能を向上させた箇所とを混在させることで、乗物室全体としての防音性能を向上させることができる。【選択図】図8
VEHICLE INTERIOR SOUNDPROOF STRUCTURE
乗物室防音構造
2023-08-04
Patent
Electronic Resource
Japanese
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 |