So you use it with your headset.

Tan Le A headset that reads your brainwaves

The headset connects wirelessly to an iPad or a smartphone.

In that headset you have fabric sensors on your forehead and above the ear.

And compared to the tens of thousands of dollars for a traditional EEG system, this headset only costs a few hundred dollars.

But there was one persistent noise that Jansky couldn't identify, and it seemed to appear in his radio headset four minutes earlier each day.

It's a free program you download for your Mac or PC, and you make free phone calls anywhere in the world The downside is that you have to wear a headset like a nerd.

Tan Le's astonishing new computer interface reads its user's brainwaves, making it possible to control virtual objects, and even physical electronics, with mere thoughts . She demos the headset, and talks about its far reaching applications.