Touch screens to identify how the finger is being used for input

           

          

              An enhancement to touch interaction that allows conventional touch screens to identify how the finger is being used for input. This is achieved by segmenting and classifying sounds resulting from a finger’s impact. Our system can recognize different finger locations including the tip,pad,nail and knuckle.without the user having to wear any electronics. This opens several new and powerful interaction opportunities for touch input in mobile devices. Where input bandwidth is limited due to small screens and fat fingers. For example, a knuckle tap could serve as a “right click” for mobile device touch interaction, effectively doubling input bandwidth. Our system can also be used to identify different sets of passive tools.