Comparison of Uncertainties in Acoustic Measurements in Building with Different Test Methods

In this paper the results of an Interlaboratory Test for field measurements of airborne and impact sound insulation are described. Eleven teams took part to this collaborative experiment, that included researchers, consultants and R&D staff of acoustical material companies. All teams measured, on the same structures: - the apparent sound reduction index of a wall, determined with two different methods, according to standard ISO 140-4 and using the procedure of standard ISO 10052; - the impact sound insulation of a floor, measured both with standard ISO 140-7 and standard ISO 10052 methods. In this way a comparison of the uncertainties of ISO 140 standards for field measurements and of the survey method of standard ISO 10052 has been possible.