And two, it does not generate its own wireless signals to make calls.

然后，手机自身不产生通话所需的无线信号。

It interprets emotions using a wireless signal to analyze subtle changes in breathing and heart rate.

它能通过无线信号分析呼吸和心率的微妙变化从而解析情绪。

Instead, it uses the ambient wireless signals put out by our smart phones, laptops, routers and tablets.

取而代之的是它使用由我们的智能手机，平板电脑, 路由器及笔记本电脑所发出的无线信号环境。

These apps use Bluetooth wireless signals to anonymously detect when two phones have spent time in a close area.

这类应用程序通过蓝牙无线信号来匿名检测2部手机是否曾在相距较近的区域待过。

I joined the MIT faculty and started working on wireless signals.

我加入了麻省理工学院并开始研究无线信号。

So what else can we sense about people using wireless signals?

那么，对于使用无线信号的人， 我们还能感知到什么呢？

The Republic was the first shipwreck to make use of a wireless distress signal and its operator was hailed as a hero.

共和国号是第一艘利用无线求救信号的遇难船，而其电报员被誉为英雄。

And as you can see, the red dot is tracking his movements very accurately, purely based on how his body interacts with the surrounding wireless signals.

正如你所看到的， 红点非常准确地跟踪他的动作，完全基于他的身体如何与周围的无线信号相互作用。