You can also opt for noise cancellation headphones.

你也可以选择降。

So I pop on my noise-canceling headphones right away on a flight.

所以我在飞上会立即戴上降。

And some headphones will be better than others.

不同降的效果也不同。

The second layer would be Active Noise-Reduction.

第二层是主动降。

Noise-canceling headphones are best, removing persistent low-frequency hums.

降最擅长去除持续的低频嗡嗡声。

Do this and then the noise canceling headphones.

做完这些后，再戴上降。

Earplugs, I put earplugs in my noise-canceling headphone.

塞，我把塞放在我的降里。

So the black spots are actually the same as what you get in noise-canceling headphones.

这些黑点实际上和降的黑点是一样的。

Did you bring those noise-canceling headphones I asked mom for?

你把我让老妈准备的降罩带来了吗？

Put on your noisecanceling headphones, 'cause it's gonna get loud.

把你的降戴上 这边会很吵的。

Now, if I'm honest, I always thought that noise cancellation was kind of the marketing tactic.

老实说，我一直认为降是一种营销策略。

And it's exactly what our noise-canceling headphones are doing.

降正是通过相消干涉达到降目的。

Now here's that same sound with the array of noise-cancelling speakers turned on.

这是同样的声音，但同时启一组降扬声器的效果。

Oh, thanks, I'm not hungry. FYI, my noisecanceling headphones proved ineffective last night.

不了 我不饿 另外昨晚证我的降无效。

Before you leave, could you test these noise-cancelling headphones?

你俩走之前，能帮我测试一下这降吗？

You know, there's Passive Noise-Canceling, or Passive Noise-Reduction, which is effectively an earplug.

你知道，有被动消声，或被动降，它实际上是一个塞。

It doesn't happen a lot but it's enough for me to not wanna noise cancel.

这并不经常发生，但是对我来说，已经足够让我不需要降了。

But it also leads to some weird questions like, does noise cancellation have volume?

但它也引发了一些奇怪的问题，比如，降有音量吗？

And that's true of just about any pair of headphones that have noise canceling.

这适用于几乎所有具有降功能的。

When you think about Noise-Canceling Technology, I like to sort of separate it into three different categories.

当你想到降技术时，我喜欢把它分成三种不同的类别。