The invention relates to a composite sound absorption module and an aircraft soundproof lavatory door. The composite sound absorption module comprises a micro-perforated plate, and the micro-perforated plate is located on one side of the composite sound absorption module. The curled back cavity is defined into a curled folded cavity form through the multiple longitudinal partition plates, the transverse partition plate is arranged between every two preset adjacent longitudinal partition plates in the multiple longitudinal partition plates, and the curled folded cavity is divided into a first sound absorption module and a second sound absorption module which are not communicated through the transverse partition plate; the first sound absorption module and the second sound absorption module are communicated with a first perforated section and a second perforated section of the micro-perforated plate respectively, the effective propagation path of the first sound absorption module is larger than that of the second sound absorption module, and the resonant frequency of the first sound absorption module and the resonant frequency of the second sound absorption module are both within a target noise frequency band range. And the first sound absorption module and the second sound absorption module realize broadband sound absorption covering a target frequency band through an acoustic coupling effect.

    本发明涉及复合吸声模块和飞机隔音盥洗室门。复合吸声模块包括微穿孔板,微穿孔板处在复合吸声模块的一侧上;以及卷曲背腔,卷曲背腔通过多个纵向隔板限定成卷曲折叠腔的形式,横向隔板设置在多个纵向隔板中预定的相邻的两个纵向隔板之间,并且卷曲折叠腔经由横向隔板分隔为不连通的第一吸声模块和第二吸声模块,第一吸声模块和第二吸声模块分别连通微穿孔板的第一带孔部段和第二带孔部段,第一吸声模块的有效传播路径大于第二吸声模块,第一吸声模块的共振频率和第二吸声模块的共振频率都在目标噪声频段范围内,第一吸声模块与第二吸声模块通过声学耦合效应实现覆盖目标频段的宽带吸声。


    Access

    Download


    Export, share and cite



    Title :

    Composite sound absorption module and aircraft sound insulation lavatory door


    Additional title:

    复合吸声模块和飞机隔音盥洗室门


    Contributors:
    LI DONGTING (author) / YANG YULING (author) / DING HAOLEI (author) / WANG HONGXIN (author) / LYU SHAOWEI (author)

    Publication date :

    2023-04-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT



    Aircraft lavatory door latch

    LONG ERIC / NODA GLEN | European Patent Office | 2021

    Free access

    AIRCRAFT LAVATORY DOOR LATCH

    LONG ERIC / NODA GLEN | European Patent Office | 2018

    Free access

    AIRCRAFT LAVATORY DOOR LATCH

    LONG ERIC / NODA GLEN | European Patent Office | 2023

    Free access

    AIRCRAFT LAVATORY DOOR LATCH

    LONG ERIC / NODA GLEN | European Patent Office | 2022

    Free access

    Ventilation and sound insulation composite door

    CHENG FANG / LI CHAO | European Patent Office | 2020

    Free access