There are a lot of research on the acoustic characteristics of the acoustic emission transducer and its array for the emission energy is concentrated in some specific direction.
在水声方面，为了得到用较小的发射功率探测到更远得距离的目标，使发射能量集中在某些特定方向，人们对水声发射换能器及其基阵的声特性进行了很多研究。
There are a lot of research on the acoustic characteristics of the acoustic emission transducer and its array for the emission energy is concentrated in some specific direction.
在水声方面，为了得到用较小的发射功率探测到更远得距离的目标，使发射能量集中在某些特定方向，人们对水声发射换能器及其基阵的声特性进行了很多研究。
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