Okay, so this is your vocal tract.

好的，这是你的声道。

This makes the vocal tract longer and gives us the physical ability to produce a wide variety of sounds.

这使得我们拥有更长的声道从而赋予我们发出更多不同声音的能力。

This seems a little surprising, because consonants and vowels use the same areas of your vocal tract.

这似乎有点令人惊讶，因为辅音和元音使用的是你声道的相同区域。

Your vocal tract is just an open-ended tube too, so it has resonant frequencies.

你的声道也是一个开口的管子，所以它有共振频率。

And whenever you vibrate your vocal chords all this vocal tract stuff filters the sound.

当你振动声带时，所有这些声道的东西都会过滤声音。

Professional singers train to lengthen their vocal tract to create richer, deeper sounds.

专业歌手通过训练延长他们的声道，以创造更丰富、更深的声音。

These roughly match how closed and open different parts of your vocal tract are when you make these sounds.

当你发出这些声音时，这些大致匹配你声道不同部分的闭合和开放程度。

Your vocal tract is a very special kind of sound filter and the reason for that is thanks to resonance.

你的声道是一种非常特殊的声音过滤器，这要归功于共鸣。

It was already very clear that Chimpanzees don't have the kind of control over their vocal tract that we do.

很显然黑猩猩们无法像我们一样控制声道。

And if you feel and think about for a minute what your vocal tract is shaped like, it's not that different.

如果你感受并思考一分钟你的声道是什么形状的，它们没什么不同。

Of course, it's not speech because to speak, I have to move my vocal tract, I have to move the articulators.

当然，这还不是说话，若要说话，我还得去动我的声道，动我的发音器官。

Only in humans is the vocal tract optimal.

只有人类的声道才是最佳的。

Articulate speech depends on a vocal tract of a particular shape.

清晰的语音取决于特定形状的声道。

Your vocal tract is basically the entire mechanism that shapes sounds from your vocal cord to your nasal cavity.

声道基本上是从声带到鼻腔塑造声音的整个机制。

But these critical 1969 computer models were based on plaster casts of the vocal tracts of dead rhesus macaques.

但这些重要的 1969 年计算机模型是基于死恒河猴声道的石膏模型。

They can produce higher frequencies by modifying the shape and tension in their vocal folds and vocal tract.

他们可以通过改变声带和声道的形状和张力来产生更高的频率。

You can go play with this if you want to see how different parts of the vocal tract are positioned to make different sounds.

如果你想看看声道的不同部分是如何发出不同声音的，你可以去玩这个。

(Sound) Of course, it's not speechbecause to speak, I have to move my vocal tract, I have to move the articulators.

（声音）当然， 这不是说话， 因为要说话，我必须移动我的声道， 我必须移动发音器。

And then the way you open and close the cavities in you mouth, your vocal tract is going to transform the sound.

然后你打开和关闭口腔的方式，你的声道会改变声音。

And we can change which frequencies stand out as we change the shape of our vocal tract by moving our tongue, shaping our lips, opening and closing our jaws.

我们可以通过移动舌头，塑造嘴唇，张开和闭上下巴来改变声道的形状，从而改变突出的频率。