To provide a sound absorption material having sound absorption performance in a wide frequency range including a frequency range around 2 kHz.SOLUTION: The sound absorption material 1 is composed of: a fixing material layer 10 made of a hard material having no continuous penetrating holes; a porous layer 31 made of a porous material formed on the fixing material layer and having continuous penetrating holes, and provided with Helmholtz resonators 23 having neck portions 21 and cavity portions 22; and a skin layer 40 formed on the porous layer. In a neck portion, the porous material is exposed and an inner wall of the cavity portion is covered with a resin layer 25.SELECTED DRAWING: Figure 1

    【課題】2kHz前後の周波数領域を含む広い周波数領域での吸音性能を有する吸音材を提供する。【解決手段】吸音材1は、連通気孔を有さない硬質材料からなる固定材料層10と、固定材料層の上に形成され、連通気孔を有する多孔質材料からなり、くび部21及び空洞部22を有するヘルムホルツ共鳴器23が設けられている多孔質層31と、多孔質層の上に形成された表皮層40と、からなる。くび部では、多孔質材料が露出しており、空洞部の内壁が樹脂層25で覆われている。【選択図】図1


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    Title :

    SOUND ABSORPTION MATERIAL


    Additional title:

    吸音材


    Contributors:

    Publication date :

    2020-08-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / E04B Allgemeine Baukonstruktionen , GENERAL BUILDING CONSTRUCTIONS



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