the air in that small of a space. >> i'm about to show you something really incredible developed at the hebrew university of jerusalem. it's something that let's the blind see, in a matter of speaking. >> they attach a camera to the head, and the camera is attached to a pc and the pc has ear phones and people listen to sounds. these sounds illustrate things like a wall, so she knows it's a wall on the left side of a house. >> this thing also interprets expressions on people's faces. by interpreting sounds they have learned after 70 hours of work to know what a sound represents, these people are able to tell if somebody is frowning or smiling. >> it's almost like learning a different language, differ sounds to represent emotions, facial expressions. once you know this sound language, when you hear it you'll know if someone is froung, a wall to the left. >> they say in the future they are doing to add colors by the use of music. i wonder what red sounds like. >> as opposed to black. >> it's not just as simple as telling walls on a house or is somebody smiling, this is describing a hair style. as you can see, you're get