【英语时差8,16】蓝鲸是歌唱家？（上）

（单词翻译）

Did you know that blue whales sing their songs exactly on pitch, with unbelievable accuracy? Scientists at San Francisco State University analyzed¹ over 4,000 blue whale songs off the coast of California. They found that all the whales produced a certain call type at exactly the same pitch — 16.02 Hertz. That’s about four octaves below middle C. Even more remarkable² than the fact that all the whales sing certain notes at the same pitch, is how perfectly³ on pitch they always are. From note to note the whales only vary in pitch by half a percent difference. By comparison, the difference between C and C-sharp is six percent.