To provide a sound absorption cover which can more effectively absorb noise on a low frequency side.SOLUTION: A sound absorption cover 1 for covering an object part which is a noise source includes: a first sound absorption layer 10 which includes a first foam layer 11 and a first skin layer 12 which is integrally formed when the fist foam layer 11 is formed and which is arranged on a noise source side; a second sound absorption layer 20 which includes a second foam layer 21 and a second skin layer 22 which is integrally formed when the second foam layer 21 is formed and in which the second skin layer 22 faces the first skin layer 12 and is laminated on the first sound absorption layer 10; and an air layer 30 formed between the facing surfaces of the first skin layer 12 and the second skin layer 22. The first sound absorption layer 10 and the second sound absorption layer 20 are made in a non-communication structure which does not have a communication hole communicated in a lamination direction, and rigidity of the first skin layer 12 is smaller than that of the second skin layer 22.SELECTED DRAWING: Figure 2

    【課題】低周波数側の騒音をより効果的に吸収できる吸音カバーを提供する。【解決手段】騒音源となる対象部を覆う吸音カバー1は、第一発泡層11と、第一発泡層11の成形時に一体成形される第一スキン層12とを有し、騒音源側に配置される第一吸音層10と、第二発泡層21と、第二発泡層21の成形時に一体成形される第二スキン層22とを有し、第二スキン層22を第一スキン層12に対向させて第一吸音層10に積層される第二吸音層20と、第一スキン層12と第二スキン層22との対向面間に形成される空気層30と、を含み、第一吸音層10及び第二吸音層20は、積層方向に連通する連通孔を有しない非連通構造となっており、第一スキン層12の剛性は、第二スキン層22の剛性よりも小さくなっている。【選択図】図2


    Access

    Download


    Export, share and cite



    Title :

    SOUND ABSORPTION COVER


    Additional title:

    吸音カバー


    Contributors:

    Publication date :

    2023-05-12


    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



    Sound absorption cover

    TOMIYAMA KOJI / ONISHI KAZUYOSHI / ADACHI YUHEI et al. | European Patent Office | 2022

    Free access

    IMPROVEMENT OF SOUND ABSORPTION MATERIAL FOR DIESEL ENGINE COVER

    Calcada, M. / Rocha, T.L. / Society of Automotive Engineers | British Library Conference Proceedings | 2009


    Improvement of Sound Absorption Material for Diesel Engine Cover

    Calçada, Márcio / Rocha, Téo Lenquist | SAE Technical Papers | 2009



    Automobile composite wheel cover with sound absorption performance and rigidity performance

    XIN LIJUAN / SI CHENGGONG / LI HAOYUAN et al. | European Patent Office | 2023

    Free access