LAUSR

Abstract The subject of the research presented in the article was the modelling of acoustic properties of two-layer baffles, used in vibroacoustic protection. Baffles of this type are used, among others, in the construction of walls of the sound insulating enclosures of machines and devices. The heterogeneous single baffles that were analysed were panels made of two sound insulation layers, solid rubber and a steel plate. A sound insulation calculation model for heterogeneous single two-layer baffles used in vibroacoustic protection has been proposed. The model has been verified in relation to the laboratory tests of rubber-steel baffles of various thickness. The results of calculations were also compared with the spectral characteristics of sound insulation obtained with the use of the mass law and commercial software. Using the proposed calculation model, simulation tests of the sound insulation effectiveness of rubber-steel and rubber-aluminium baffles were performed.