Sound Transmission through the T-Junction of Building

T-junctions exist between walls and between wall and floor within the building structure,its sound transmission theory is different from transmission through the panels or slabs.So,the calculation of its sound transmission coefficient is one of the keys to predict the sound transmission through whole structure and flank transmission.In this paper,the study on the sound transmission through T-junction and measurement is presented,furthermore,the approaches how to improve sound insulation are also discussed here,that is,the better sound insulation should be obtain by adjusting the thick ratio between plates in the junction.