This pulse broadens and its peak amplitude is delayed linearly as the number of successive air curtains is increased.
2
信号的长度和复杂性表明，当相继的气帘数目增加时交混回响的程度也增加。
Length and complexity of the signals indicate that reverberations occurred to an increasing extent as the number of consecutive air curtains was increased.
3
第一个空气流使峰值振幅大大降低，以后就保持在无气帘时振幅的0.1到0.2倍。
The peak amplitude is decreased substantially by the first air stream and thereafter remains between 0.1 and 0.2 of the amplitude without air curtains.
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