Development of the methodology for calculating sound insulation using the method of statistical energy analysis

Non-resonant and resonant sound transmission through the enclosing structure was investigated. The method of statistical energy analysis was used, non-resonant energy links were added to the system of energy balance equations. A well-known variant of representing non-resonant sound transmission directly from room to room, bypassing the enclosing structure, is considered. A scheme of energy connections between the elements is proposed, which shows non-resonant sound transmission from room to panel, formulas for calculating the coefficients of non-resonant energy connection from room to panel are proposed by calculating the impedance of transverse vibrations of the panel, taking into account the impedance of mass, bending stiffness and losses in the panel. The results of calculating and measuring sound levels in reverberation chambers and vibration acceleration on a glass plate between them are presented. A satisfactory convergence has been shown between the calculation and measurement results, which makes it possible to use the applied methodology for calculating sound and vibration parameters in more complex vibroacoustic systems.