利用MTALAB实现水液面的控制，控制效果极佳-Use MTALAB realize the liquid surface water control

计算声波由空气经过周期性圆柱空腔的带有钢背衬的橡胶板，出射介质为水的透射和吸声系数。并对比了分别将橡胶和钢板作为压力声学以及都作为压力声学情况下的效果。(A rubber plate with a steel back lined with air through a periodic cylindrical cavity is calculated. The transmission medium is the transmission and sound absorption coeffic