Plank + cheap mic = touch sensitive tablet

Some software and cheap microphones is all that is needed to turn a wooden board into a touch sensitive input device. The video is pretty impressive.



Two or more sensors are attached around the edges of the surface. These pinpoint the position of a finger, or another touching object, by tracking minute vibrations. This allows them to create a virtual touchpad, or keyboard, on any table or wall.

Watch the video

More details on: http://www.newscientisttech.com/ ... es-interactive.html


Above is excerpted from: http://www.boingboing.net/2006/11/28/plank_cheap_mic_touc.html

顶一下！

怎么也需要个4 line in吧... 普通的single channel 8 bit sampling怎么搞得定...