Comparison of predicted and measured structure-borne sound of an industrial washing machine on a heavy concrete floor

摘要

The Reception Plate Method (RPM) as proposed by CEN/TC126/WG7 in EN 15657-1 estimates the structure-borne sound power injected from a (high mobility) vibrating source into a (low mobility) concrete reception plate. This power level can be used as an input to predict structureborne sound pressure levels in buildings according to the calculation model in EN 12354-5. To validate both the RPM and the prediction model, measurements are done using two sources: a standard ISO tapping machine and an industrial washing machine placed on three different bases. Both sources are successively placed on the RP and on a concrete floor of a standard impact sound test cell. The sound pressure level in the cell underneath is measured and compared with calculated values. Difficulties in both the test method and the prediction model are investigated.