Enhanced Touchscreen Technology
TapSense is a project that enhances touchscreen technology by allowing surfaces to identify the type of object being used for input. Researchers Chris Harrison, Julia Schwarz and Scott E. Hudson, at the Human-Computer Interaction Institute and Heinz College Center for the Future of Work, Carnegie Mellon University have found a means that can identify different parts of the anatomy of a human finger including the tip, pad, nail and knuckle. It utilizes sounds resulting from a finger's impact. That's not all; the same prototype can also sense different tools including foam, multiple pens types, and brushes. The system could sense who was using which pen, allowing for collaborative drawing.
Read more about TapSense here: