Relationship between Structural Parameters of Sonic Crystals and Sound Transmission Loss

Some experiments indicates that sonic crystals contain local resonant structures which is important for noise and viberation control. The effects of structural parameters on sound transmission loss of three-component sonic crystals are analyzed in this paper. The results indicates that in a certain frequency range,the higher the filling rate,the larger the sound transmission loss,and in low frequency range,there is no relationship between topological structure and sound transmission loss.