一、引言在进行海洋爆炸声传播信号分析时,需要同时分析直达波和反射波。我们希望:在分析直达波时,需把反射波去掉;反之,分析反射波时需把直达波去掉。去掉反射波,可直接调整频谱分析仪的采样时间。(因反射波在后)而想去掉直达波,保留反射波,依靠调整采样时间就无能为力了。为此,研制了波形选通器,可方便地达到上述目的。二、方案的考虑1.输入门限电平的选择:由于声源距离及传播条件的影响,海上 I. INTRODUCTION When conducting acoustic explosion signal analysis of marine explosions, it is necessary to analyze both the direct wave and the reflected wave simultaneously. We hope: In the analysis of direct waves, the reflected waves need to be removed; the other hand, when analyzing the reflected waves need to remove the direct waves. Remove the reflected wave, you can directly adjust the spectrum analyzer sampling time. (Due to reflected waves in the post) and want to get rid of direct waves, keep the reflected waves, rely on adjusting the sampling time is powerless. To this end, developed a waveform gated, can easily achieve the above objectives. Second, the program considerations 1. Enter the threshold level of choice: Due to the distance of sound source and propagation conditions, the sea