大家知道海豚可以制造三种声音：哨声、咔嚓声和促发脉冲声。
Dolphins are known to make three types of sounds: whistles, clicks and burst pulses.
研究了一种可控脉冲声生成技术，介绍了声源设计方案以及脉冲声工作生成的主要原理。
Including the principles and the source design, a method of digitally-controlled sound impulse generator is introduced.
脉冲声技术是一种很常用的水声测量技术，但由于脉冲声存在着瞬态过程，严重影响了它在低频下的使用。
Sound pulse technique is often used in the underwater acoustic measurement, but it has transients, so it can not be used in low frequencies.
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