With mobile devices perpetually shrinking, touchscreen space is starting to become the next challenge for makers of cell phones and music players.
Luckily, Microsoft's research lab has come up with a solution to the surface area problem: the human body. Researchers from Microsoft and Carnegie Mellon have created an interface that allows people to use their arms and fingers like touch screens. The system, called Skinput, works by recognizing a variety of acoustical (vibration) patterns that happen when you tap your arm. Video after the jump."
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