The primary aim of this thesis is to develop a high-performance calculation model for predicting vibration characteristics and consequent measures of the sound transmission loss of lightweight building structures. An application of the currently normative covered processes for these structures is explicitly excluded in the relevant body of standards. The current calculation models, based on scientific models, do not offer satisfactory reliability in the quality of predicting the acoustical performance characteristics, especially in the low frequency range, to describe the acoustical behavior of such structures. Beside the expected vague calculation results in the spectra of low frequencies, it is not possible to build an image of formations of the connections between the outer panels and the supporting structure, which can present an important factor in these frequency ranges. Likewise with the current state of the art simulation models it is not practicable to incorporate the effects of fluctuating quality of workmanship, such as panel fastening, into the body of rules with the current processes. These facts lead to over-dimensioning the building components to compensate for the until now mostly unknown phenomena and their unknown influence of the acoustical performance characteristics. Within the scope of this thesis, different influencing parameters of the formation of the connecting joint between various wall components are identified and their effects on the vibration characteristics are quantified. For this purpose different structures are examined and thereby the formation of the connecting bodies were varied with the present parameters. For this, the tested structures were mounted in the testing stations in different ways of installation, free swinging and in the classical manner of installation following the current normative standards. Following, the tested structures were excited by sources of body and airborne sound. Through the metrological analysis of the velocity distribution on the surface by laser vibrometry and the simultaneously measurement of the introduced vibration energy, the transfer functions between board surfaces could be identified. The accrued measurement results offered not only the identification of parameters, but can also be used in the development and validation of the simulation model based on the finite element method. A good correspondence between measurements and results of the introduced numerical model could be achieved. The presented simulation model offers the possibility of the consideration of the identified parameters in the formation of the connecting bodies such as the dimension of the screws, the distance between screws, the tightening torque, and the position of the screws on supporting structures. By way of the numerical results of the validated predictive model, one can examine and optimize the interaction between various wall components and their connecting elements. Not only can one optimize 'light' structures with reduced metrological effort, caused by material and work related fluctuations, but one gets a measurement of the sound transmission loss with accompanying standard deviations for different junction types. For producers and designers, beside the numerical optimization process and the possibility of predicting the relevant building acoustic characteristic parameters of partition walls, it offers possible measures for increasing manufacturing quality, with reference to documented evidence of sound proofing requirements for structures.