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

所以我在飞机上会立即戴上降噪耳机。

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噪了。

You can also opt for noise cancellation headphones.

你也可以选择降噪耳机。

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

你知道，有被动消声，或被动降噪，它实际上是一个耳塞。

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

降噪耳机最擅长去除持续的低频声。

And some headphones will be better than others.

不同降噪耳机的效果也不同。

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

耳塞，我把耳塞放在我的降噪耳机里。

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噪耳机的黑点是一样的。

Do this and then the noise canceling headphones.

做完这些后，再戴上降噪耳机。

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

你把我让老妈准备的降噪耳罩带来了吗？

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

这是同样的声音，但同时开启一组降噪扬声器的效果。

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

把你的降噪耳机戴上 这边会很吵的。

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

不了 我不饿 另外昨晚证明我的降噪耳机无效。

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

你俩走之前，能帮我测试一下这降噪耳机吗？

The second layer would be Active Noise-Reduction.

第二层是主动降噪。

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

老实说，我一直认为降噪是一种营销策略。

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，降噪有音量吗？

Now researchers have come up with a device that's like noise-cancelling headphones-but for a building.

现在，研究人员发明出一种类似于降噪耳机的设备，但是用于建筑物的。

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

当你想到降噪技术时，我喜欢把它分成三种不同的类别。

But on the left side, you've got a same kind of wheel that adjusts the noise-canceling features.

而在左边有一个相似的卷盘设计，只不过是用来调节降噪的。