The technical literature in acoustics makes available various predictive formulas, with experimental basis or related to the mass law, from which it is possible to calculate the weighted sound reduction index and the behavior in frequency of a glass partition, depending on its conguration as a simple glass, laminated or insulated one.
This research relies on a large number of laboratory certicates of airborne sound insulation of glazing for the construction industry, to propose an evaluation of the eectiveness of predictive formulas available to the designer. With the goal of providing new useful elements in the preliminary steps of the acoustic design of buildings enclosures, and taking into account recent technological results in this specic eld, this study carries out a comparison between experimental and predictive values of sound reduction, and also analyzes the correspondence between any resonance and coincidence phenomena noticed in laboratory and the informations provided by the formulas for the determination of frequency critical values. The results obtained can form the basis for a next phase of study aimed at the analysis of correlation between acoustic performance of the glazing and nal performance of the window in which it will be installed.