Results: We measured the pulse sound pressure from water broken down and bubble collapse near F 1 and F 2 respectively and made the simulated lithoclastic experiments for a small plaster ball. 结果:分别在F1和F2点测得光击穿及空化气泡闭合与反跳时产生的声压脉冲信号;用石膏小球进行了碎石演示性实验,取得初步结果。