Sense motion by using doppler effect

Daniel Rapp has written a blog post about using the doppler effect to sense motion. In his experiments he's used hand gestures in free space to generate the scroll, tap, and double-tap gestures on his laptop. He's produced a library which allows a computer to transmit a tone from its speaker while at the same time receiving through its microphone. As the hand … Continue reading Sense motion by using doppler effect