Calculation models for analysing the sound insulating properties of homogeneous single baffles used in vibroacoustic protection

Abstract The article presents the results of laboratory tests and calculations, using selected theoretical models, regarding the airborne sound insulation of five homogeneous single baffles. The analysed materials of various thickness, such as steel, aluminium, PVC, acrylic and plexiglass, are used in the construction of walls in vibroacoustic protection as sound absorbing and insulating enclosures or acoustic barriers. Based on the analysis of the obtained results, a new calculation model of sound insulation for single homogeneous baffles used in passive noise control methods was proposed. A comparative analysis of computational models for these materials showed that the proposed model is the most accurate among traditional theoretical ones, both in terms of the frequency characteristic and the single-number index of sound insulation. Verification of the new model was carried out with reference to the results of experimental tests, results obtained using commercial software and experimental results from another testing laboratory of building partitions, concerning several glass plates, which may also be used as elements of vibroacoustic protection.

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