QUANTIFICATION OF STRUCTURE-BORNE SOUND TRANSMISSION IN BUILDINGS

The aim of this paper is to predict the sound power radiated by a floating floor system, commonly used in buildings, using a modal model. A modal model using fluid-structure interaction and the Jinc function approach was implemented for the calculation of the sound power radiated into a receiving room. The model predicted the sound power radiated from the direct wave field in the vicinity of the driving point, as well as the sound power radiated from the reverberant wave field. The result is presented for a simply-supported floor. The analysis has highlighted the main physical characteristics of the sound radiation mechanism. At low frequencies, the power radiated by the near field of the point force has been found to make significant contribution to the total power radiated.