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Haptic Speaker Lets Blind and Visually Impaired People Read Braille in Midair

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Please shareTweetGerman researchers have developed an ultrasonic haptic speaker that allows them to display Braille numbers without contact. Researchers at Germany’s Bayreuth University have been working to develop a special speaker system that emits ultrasound waves with the purpose of letting people read braille in midair. It does this by using acoustic force to stand