Uncertainty of measured and calculated sound insulation in buildings - Results of a Round Robin Test

An inter-laboratory comparison has been made in situ with the participation of 8 laboratories. The operators measured airborne and impact sound insulation of 7 partitions according to the ISO 140 standards and some additional guidelines. Variations of sound insulation, and their components, have been analyzed. In addition, field measurements of sound insulation in 40 building cases were compared to calculations according to EN 12354 (-1, -2). Safety margins for predictions of 3 dB are recommended for calculation of heavy building partitions, with respect to an estimated risk of 5% being disapproved by a sample measurement in situ.