Following the recent news of the upcoming pressure sensitive keyboard is this new way to input information on a computer screen or some other device.  The video above shows off the implementation of creating sound by scratching a surface with your fingers that, in turn, generates sound waves which are picked up by a receiver.  The receiver sends the signal to the device it is connected to and viola!  For example, you can “write” a letter on a flat surface, and the sounds waves from your scratching will output the desired letter on screen.  Or, you can create your own personal gestures to answer a phone call, enable speakerphone, and close out your email application all at the same time.  Cool stuff.  Keep it coming, innovators.

[Via Gizmodo]