Another interesting way of interacting with your computer

I'm a sucker for all kinds of experimental and alternative interfaces with a computer. That's why I developed the Google Earth Led Torch Controller. Although this next one doesn't have that many applications, it is nevertheless quite interesting.

This is Scratch Input, an acoustic-based input technique that relies on the unique sound produced when a fingernail is dragged over the surface of a textured material, such as wood, fabric, or wall paint.

Check out the video for a demo: