Sound transmission using statistical energy analysis

Statistical energy analysis is used to predict the sound transmission loss, the radiation resistance and the vibration amplitude of a partition. Agreement between theory and experiment is shown to be good. The “mass-law” sound transmission is seen to be due to non-resonant modal vibration while the increased transmission in the coincidence region is seen to be due to resonant modal vibration. The observed vibration amplitude is also shown to be due to resonant modes. The previously observed discrepancy between the values of vibration amplitude derived from the mass law and those observed experimentally which has been described in the literature [1 ] is thus satisfactorily explained.