Calculation Model of Sound and Vibration Propagation in a Building Fragment Based on the Method of Statistical Energy Analysis

Abstract

The theory sound insulation based on the matching of the wave fields by M. S. Sedov and Statistical energy analysis (SEA) are used to model sound transmission through single and double leaf partitions. A fragment of a building is considered as a set of acoustically connected rooms and structures. On the basis of the method of statistical energy analysis, the equations of energy balance are written, the solution of which allows to determine the energy of sound in the rooms and the energy of sound vibration in the structures. A complete model of the SEA, including bending, longitudinal and shear waves in structures and sound waves in the air volumes of the rooms, is proposed. The coupling loss factors from room to room (non-resonant sound transmission through partitions) are calculated on the theory by M. S. Sedov. It is given the calculation of the coupling loss factors, internal losses and modal densities. The results of vibro-acoustic calculations and measurements on models of the building fragments are presents.