An international team has come up with a system, called Skinput, which has the ability to detect the ultralow-frequency sound produced by tapping the skin with a finger, and the microchip-sized "pico" projectors now found in some cellphones, reports New Scientist.
NEWS Source: IndiaTimes
Read more here Skinput uses a bio-acoustic sensing array coupled with a wrist-mounted pico-projector to turn your skin into a touch-screen. Confused? Don’t be. It’s amazingly simple.
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Wired.com Video:
http://www.wired.com/gadgetlab/2010/03/skinput-turns-your-arm-into-a-touch-screen/