The Tacit Project by Grathio Labs is DIY Sonar for the Blind

“Hand-Mounted Haptic Feedback Sonar Obstacle Avoidance Assistance Device” made by Grathio Lab helps blind to walk without a stick and with much more confidence. The device is worn on the wrist and user can feel the pressure as s/he gets closer to an object. The device responds fast to the environmental changes that make it safe for the visually impaired to feel the surroundings.

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