二维声子晶体能带结构计算程序，采用的是平面波展开法，并且可以用matlab到出能带结构图(Dimensional phononic crystal band structure calculation program, using the plane wave expansion method, and can be used to matlab energy band structure of FIG.)

EMMT法计算流固耦合声子晶体能带，适合学习声子晶体能带计算，可以自己在此基础上修改。(EMMT to calculate the solid-fluid phononic)