Investigation of flanking noise transmission in concrete and multilayered composite structures

近年来，建筑结构内的噪声传输已成为城市发展面临的主要问题之一。噪声可以通过直接或间接的路径在相邻空间之间传播。直接传输路径包括分隔房间的墙壁和/或地板。然而，间接传输路径涉及的不仅仅是房间之间的分离元件，在这种情况下，传输的噪声被称为侧翼噪声。侧翼路径为空气振动从某个外壳逃逸或泄漏到另一个外壳提供介质或路径。因此，侧翼噪声可以是空气传播的，也可以是结构传播的。空气传播路径可以通过门窗缝隙、电源插座、服务管道和管道，而结构传播路径可以通过钢框架、石膏板或混凝土板扩散。在隔音方面所做的大部分努力都集中在减少直接声上

Noise transmission within building structures is becoming one of the major issues that face urban development in recent years. Noise can be transmitted between adjacent spaces either through direct or indirect paths. The direct transmission paths include walls and/or floor separating the rooms. However, indirect transmission paths involve more than just the separating elements between the rooms and in such case the noise transmitted is referred to as flanking noise. The flanking paths provide mediums or routes for the air vibrations to escape or leak from a certain enclosure and reach another one. Thus, the flanking noise can be either air-borne or structure-borne. The air-borne transmission paths can be through doors or windows gaps, electrical outlets, services pipes and ducts while the structure-borne can be diffusive through steel frames, gypsum boards, or concrete slabs. Most of the efforts done in sound insulation are focused on the reduction of direct sound