Acoustic sensors make surfaces interactive
November 29, 2006 | Source: NewScientist.com news service
Tai-Chi (Tangible Acoustic Interfaces for Computer-Human Interaction), a series of acoustic sensors that turn any surface into a touch-sensitive computer interface, has been developed by European researchers.
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.