Acoustic sensors make surfaces interactive
via Kevin Walker:
A series of acoustic sensors that turn any surface into a touch-sensitive computer interface have 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.
The system, called Tai-Chi (Tangible Acoustic Interfaces for Computer-Human Interaction), was developed by researchers from Switzerland, Italy, Germany, France and the UK. "We have made a system that can give any object, even a 3D one, a sense of touch," says Ming Yang, an engineer at Cardiff University, UK, who is coordinating the project.
A video produced by the researcher shows four sensors attached to a flat, vertical surface, being used to trace a researcher's finger (4.6MB, wmv format). Another video shows a simple interactive instrument developed using the system. The sensors were also used to create an interactive globe that accesses geographical information on a computer screen when the user touches different regions.
read more on NewScientist.com
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