Biosensor Enables Human Arm to Be Used as Touch Screen
March 3, 2010 – 2:37 pm
From the Wire: Researchers at Carnegie Mellon University and Microsoft have developed an acoustic biosensor that turns an arm into a crude touch screen, writes Kristina Grifantini on the Technology Review blog.
An armband, worn around the bicep, detects minute sound waves that travel through skin when it is tapped. The researchers designed a software program that can distinguish the origin of the acoustic sounds—which vary due to slight differences in underlying bone density, mass and tissue. The system then translates these locations into button commands. A pico projector embedded in the armband projects a display—a game of Tetris or button controllers—onto a user’s palm or arm.
The researchers found that they were able to achieve 95.5% accuracy with the controllers when five points on the arm were designated as buttons.
Tags: biosensor, Carnegie Mellon University, Microsoft, touch screen
