Provided is a sound-absorbing material that is thin and lightweight and is excellent in low-frequency sound-absorbing property. The sound-absorbing material of the present invention includes a laminated structure including: a perforated layer; and a porous layer, wherein the sound-absorbing material has a plurality of hole portions extending from a surface of the perforated layer opposite to the porous layer to a depth of a length L, provided that the length L satisfies 0


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    Title :

    SOUND-ABSORBING MATERIAL


    Contributors:
    HOSODA KOSUKE (author) / OKAHARA KAI (author)

    Publication date :

    2020-02-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    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 / B60C VEHICLE TYRES , Fahrzeugreifen / G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES



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