There is provided a sound-insulation material for a vehicle, that can reduce the weight thereof and exhibit sufficient sound insulation performance against noise of 500 Hz to 6400 Hz generated in vehicles. The sound-insulation material for a vehicle, of the present invention, includes: a core layer 10 having tubular cells 20, the tubular cells being arranged in a plurality of rows; an airflow-blocking resin film layer 40 provided on one surface of the core layer; and a decoupling layer 30 provided on the airflow-blocking resin film layer 40, wherein: the cells have closed surfaces 21 and open ends 22 in every other row at cell ends on one surface of the core layer; at cell ends on the other surface of the core layer, the cells have open ends in the rows where the cells have the closed surfaces at cell ends on the one surface, and have closed surfaces in the rows where the cells have the open ends at cell ends on the one surface; open ends of the cells each allow an internal space of the cells to be in communication with an outside; and an average (P/v)/Za is 2.8 to 10 between 500 and 6400 Hz, where: P and v are respectively a sound pressure and a particle velocity on a surface of the airflow-blocking resin film layer provided on the core layer, the surface being opposite to the core layer; and Za is an acoustic impedance of the decoupling layer.


    Access

    Download


    Export, share and cite



    Title :

    SOUND INSULATING MATERIAL FOR VEHICLE


    Additional title:

    SCHALLDÄMMENDES MATERIAL FÜR FAHRZEUG
    MATÉRIAU ISOLANT ACOUSTIQUE POUR VÉHICULE


    Contributors:

    Publication date :

    2025-06-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B29D PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE , Herstellen besonderer Gegenstände aus Kunststoff oder aus Stoffen in plastischem Zustand / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



    SOUND INSULATING MATERIAL FOR VEHICLE

    FUKUI KAZUKI | European Patent Office | 2021

    Free access

    Sound Insulating Material For Vehicle

    FUKUI KAZUKI | European Patent Office | 2021

    Free access

    Sound insulating material for vehicle

    FUKUI KAZUKI | European Patent Office | 2024

    Free access

    SOUND INSULATING MATERIAL FOR VEHICLE

    FUKUI KAZUKI | European Patent Office | 2020

    Free access

    FIBER AGGREGATE FOR SOUND INSULATION, SOUND ABSORBING/INSULATING MATERIAL, AND SOUND ABSORBING/INSULATING MATERIAL FOR VEHICLE

    SOTA HIROYOSHI / IKEAGAYA MORIHIKO / URABE KENICHI et al. | European Patent Office | 2020

    Free access