“Ever since the advent of smartwatches, technologists have been looking to expand interactions beyond the confines of the small watch face. A new wearable technology developed at Carnegie Mellon University suggests turning the entire lower arm into a touchpad. Called SkinTrack and developed by the Human-Computer Interaction Institute’s Future Interfaces Group, the new system allows for continuous touch tracking on the hands and arms. It also can detect touches at discrete locations on the skin, enabling functionality similar to buttons or slider controls. Previous “skin to screen” approaches have employed flexible overlays, interactive textiles and projector/camera combinations that can be cumbersome. SkinTrack, by contrast, requires only that the user wear a special ring, which propagates a low-energy, high-frequency signal through the skin when the finger touches or nears the skin surface.”
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