摘要：Recently, acoustic properties of various structuresystems of the buildings concerning noise reduction arebecoming the major field of investigation among scientists,designers and manufacturers. The reasons of noise, whichis propagating in the air and structural medium of therooms, are human activities, sound expression of humanemotions, and processes of the technical machinery sys-tems. Control of these processes to reduce the noise is usu-ally very complicated and sometimes impossible. That'swhy this problem is usually solved by using passive noisedamping systems which are based on sound wave absorp-tion, diffraction and throughput losses, and reduction ofoscillations. Recent years show the growth of unique build-ings for industry, leisure and sports, and the need of pre-diction of structural system behaviour subjected to acousticload is becoming more and more important to effectivelyreduce noise inside the building as well as outside duringdesign, construction and exploitation. To be able to predictthe interaction between building structure systems [1-3]and acoustic field, modelling of closed space structure(wall, ceiling, flooring, partition walls) geometry andphysical properties influence on noise (sound) parametersunder acoustic load at given space point is performed. Theinvestigation of such influence can be done by applyingboth mathematical and physical modelling, which can berealized by analytical method or applying numerical meth-ods. Evaluating different physical and mechanical proper-ties of the closed space structure (walls, ceilings, flooring,partition walls) of the building, including possible dam-ages, the latter can be considered as non-homogeneous.
