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Still Waters

'Forcefield' technology controls computers

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Researchers at Bristol University have developed a new system that simulates the feel of objects in mid-air using nothing but sound.

The “UltraHaptic” system uses an array of ultrasonic transducers – a grid of small piezoelectric speakers that produce waves of ultrasound, the same as those used to scan babies in the womb – which align to produce an invisible layer of ultrasonic vibrations in the air above a display. This creates a small tactile sensation on the surface of human skin.

http://www.theguardi...minority-report

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