ON This invention relates to a single or multilayer sound transmission board for use in construction of the partition walls, ceilings or floors of buildings and as soundproof panel for aircraft engines or any place where noise reduction is required. A multilayer composite board (10) comprises layers (11) whose thickness determined by convergence of two functional dependences of a weighted sound reduction index Rx or sum of Rx and spectrum adaptation term Ctr from the surface mass and the critical frequency, wherein the critical frequency of the layer equals to or exceeds the threshold of 4000 Hz. The layers of the multilayer board are lightly fixed together mechanically by screws or by gaskets or suitable adhesive materials, providing layer by layer sound wave propagation through the board. 25 25 26 25 Figure 2


    Access

    Download


    Export, share and cite



    Title :

    IMPROVED SOUND TRANSMISSION LOSS BOARD The improved acoustically resistant composite board


    Contributors:

    Publication date :

    2016-06-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G10K Tonerzeugungsvorrichtungen , SOUND-PRODUCING DEVICES / B64C AEROPLANES , Flugzeuge / E04B Allgemeine Baukonstruktionen , GENERAL BUILDING CONSTRUCTIONS




    Production method of high-temperature-resistant sound-insulation composite board

    WU HONGJUAN / HUANG CHANGCAI | European Patent Office | 2021

    Free access

    SOUND ABSORBING STRUCTURE HAVING ONE OR MORE ACOUSTIC SCATTERERS FOR IMPROVED SOUND TRANSMISSION LOSS

    SU XIAOSHI / BANERJEE DEBASISH | European Patent Office | 2022

    Free access

    ACOUSTICALLY ABSORBING TEXTILE COMPOSITE

    ANGELA WEIK / SANDRA VILLING-FALUSI / PETER RUTSCH | European Patent Office | 2018

    Free access

    Composite Materials Providing Improved Acoustic Transmission Loss for UAVs

    Callicoat, Jeffrey R. / Gaeta, Richard J. / Jacob, Jamey D. | AIAA | 2014