用平面波展开法计算二维声子晶体带隙,matlab程序运行时导入数据文件作为输入参数，实现了对10个数字音的识别程。- Computation Method D phononic bandgap plane wave, Import data files as input parameters matlab program is running, Realization of 10 digital audio recognition progra.

课程设计时编写的matlab程序代码，用平面波展开法计算二维声子晶体带隙,使用拉亚普诺夫指数的公式。- Course designed to prepare the matlab program code, Computation Method D phononic bandgap plane wave, Raya Punuo Fu index using the formula.