In the 1960s, they did an experiment where they set off a loud noise off the coast of Perth,Australia,and they detected it as far away as Bermuda,20,000 kilometers away.

20世纪60年代，他们在澳大利亚珀斯海岸外进行了一项实验， 他们在离岸20, 000公里的百慕大群岛发现了巨大的噪音。