This work aims at predicting the installed structure-borne sound power of a reference source, using approximated expressions based on equivalent quantities. The installed power level is calculated from the source equivalent free velocity and the equivalent mobilities of the source and the receiving structure. The input data are determined in third-octave frequency bands. Simplified expressions are used according to the source and receiver equivalent mobility ratio. The installed power value obtained can then be used as input data for a model predicting structure-borne noise levels on site. The reference source is characterized from laboratory measurements. The installed power is predicted for two different receivers: a heavy concrete floor and a lightweight wooden floor; their equivalent mobilities are estimated or measured. The calculated installed power values are presented and compared to experimental results. This provides information about the accuracy of the power expressions used.
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