METHOD FOR DESIGNING A SOUND-ABSORBENT WALL

摘要

Method for designing a sound-absorbent wall (1) having cavity structures, wherein each cavity structure comprises a primary cavity (2) in a sound-absorbent surface (8) of the wall (1). The method comprises the steps for determination of an absorption spectrum of the sound-absorbent wall (1) as a function of design parameters, which, for each cavity structure, consist of a surface porosity OMEGA of the sound-absorbent surface (8), the primary length of the primary cavity (2) and the primary crosssection of the primary cavity (2), variation of at least one of the design parameters and selection of values of the design parameters where the absorption spectrum meets a desired absorption spectrum. In one embodiment, by means of which the absorption spectrum becomes more broadband, each cavity structure further comprises a secondary cavity (3) and the design parameters further comprise the secondary length of the secondary cavity (3) and the secondary crosssection of the secondary cavity (3).