An underwater speaker in each tank played quiet natural sounds at all times.

每个水箱里都装有一个水下扬声器，始终播放安静的自然声音。

The initial studies created sound waves artificially, basically cranking the volume on giant underwater speakers.

最初的研究是人工产生声波，基本上是在巨型水下扬声器上调高音量。

Gordon and his colleagues played that symphony of snapping shrimp and whooping, hammering, croaking fish on underwater speakers for six weeks at a test reef built off the coast of Australia.

戈登及其同事在澳大利亚海岸附近建造的试验礁石处，用水下扬声器将虾的“噼啪”声以及鱼的“呜呜”、“嘭嘭”和“呱呱”声播放了六周。

Gordon and his colleagues played that symphony of snapping shrimp and whooping, hammering, croaking fish on underwater speakers for six weeks at a test reef built off the coast of Australia.

戈登和他的同事们在澳大利亚海岸外建造的一个试验礁石上，用水下扬声器播放了六周的虾虾和鸣叫、锤击、呱呱叫的交响曲。