Subjects were played one of two tones.

实验对象会听到两种不同的提示音。

And then it's two tones, and then it's more.

然后是两个音，然后是更多。

And we have " down" , you need to do two: " tone down" , " go down" .

而我们有“down”，你需要做两个：“tone down”，“go down”。

Maybe in '03, '04 where they had the two tones or something like that but nah it gotta be solid for me.

也许在 03 年、04 年他们有两种音色或类似的东西，但不， 它对我来说必须是可靠的。

Because you can always hear at least two tones rising in pitch at the same, your brain is tricked into perceiving a constant ascending tone.

因为您总是可以听到至少两个音高同时升高， 所以您的大脑会被欺骗，感知到一个恒定的升调。

Even an untrained individual can distinguish two tones that differ by only two-tenths of a percent, which is one-thirtieth of the difference between two piano notes.

即使未经训练的人也可以区分仅相差十分之二的两个音调，这是两个钢琴音符之间差异的三十分之一。

Even an untrained individual can distinguish two tones that differ by only two-tenths of a percent, which is one-thirtieth of the difference between two piano notes, and a trained musician can do even better.

即使是未经训练的常人也可以区分相差仅 0.2% 的两个音调，也就是相邻钢琴音调差距的 30 分之一，一位训练有素的音乐家还能辨认得更准。