scratch input allows us to use solid surfaces as an input devices by capturing the sounds they produce. using a stethoscope and a high pass filter, they capture the unique sounds of specific gestures. custom software then translates this to actions for applications. The video shows some really amazing stuff, like turning an entire wall into an input device. It goes around corners and past doorways. They even talk about potential using your clothes to capture input.
[via Procrastineering]
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