The invention relates to a multi-layer sound absorber comprising a flow-resistant non-woven fabric having at least two individual flow-resistant layers, the individual flow-resistant layers being arranged one above the other in the direction of penetration of the sound waves to be absorbed and each having a flow resistance of between 300 Pa/m and 1800 Pa/m, preferably between 400 Pa/m and 1500 Pa/m, the flow resistance of the individual flow-resistant layers being greater than the flow resistance of the individual flow-resistant layers being greater than the flow resistance of the individual flow-resistant layers, and the flow resistance of the individual flow-resistant layers being greater than the flow resistance of the individual flow-resistant layers being greater than the flow resistance of the individual flow-resistant layers. And the flow resistance of each independent flow resistance layer is increased layer by layer in the penetrating direction. The invention further relates to a method for producing a multi-layer sound absorber according to the invention and to the use of a multi-layer sound absorber according to the invention for sound absorption in the automotive industry and in the architectural and indoor acoustic fields.

    发明涉及一种多层吸音器,该多层吸音器包括具有至少两个单独流阻层的流阻无纺布,其中,所述单独流阻层在所要吸收的声波的贯穿方向上上下布置,并且分别具有在300Pa s/m至1800Pa s/m之间,优选在400Pa s/m至1500Pa s/m之间的流动阻力,其中,各单独流阻层的流动阻力在贯穿方向上逐层增加。发明还涉及一种制造根据本发明的多层吸音器的方法,以及根据本发明的多层吸音器在汽车行业以及建筑和室内声学领域的用于吸音的用途。


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    Title :

    Multilayer sound absorber, method for producing multilayer sound absorber and use of multilayer sound absorber


    Additional title:

    多层吸音器、制造多层吸音器的方法和多层吸音器的用途


    Contributors:

    Publication date :

    2025-03-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / 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 / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / D04H Herstellen von flächigem Textilgut, z.B. aus Fasern oder fadenförmigem Material , MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL




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