Submission + - Acoustic sensors turn surfaces into touchpads
TeknoHog writes: "European scientists have developed a system for tracing the position of fingers on any surface. From the New Scientist article: "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.""