The sound of a fingernail raking across a table or a board may be enough to drive most people crazy. But get past that annoyance and it could become a way to answer your phone, silence a call or turn ...

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.

MOUNTAIN VIEW, Calif. -- Google's annual developer conference doesn't officially kick off until Wednesday but about 120 of the company's youngest developers are already getting to preview one of its ...