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Gesture Control System Uses Sound Alone


SoundWave

SoundWave uses the Doppler effect and the microphone and speakers in your computer to sense and interpret gestures.

Credit: Microsoft Research

When you learned about the Doppler Effect in high school physics class—the wave frequency shift that occurs when the source of the wave is moving, easily illustrated by a passing ambulance—you probably didn't envision it helping control your computer one day.

From Technology Review
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