underwater speakers meaning in Chinese

水下扬声器

" then we played it back to the dolphins through an underwater speaker and we found they responded strongly
“接着，我们用一个水下扬声器将电子合成声播放给海豚听，发现它们有强烈的反应。
Janik and his crew recorded the name calls of each dolphin , and digitally removed the voice features of each call . they then played the computerized calls and digital versions of other random calls through underwater speakers where the dolphins were held
研究发现，如果某只海豚听到一个类似自己亲属“名字”的叫声后，会时不时地转向扬声器，在14例试验中，有9例产生如此现象。