Project Tacit: Sonar For The Blind. Tacit is a hand-mounted device to let the blind remotely feel the world around them. Much more information including the details to make one are available at http://grathio.com/tacit
“America’s Blind Spot: What’s Preventing us from Including those who are Blind in Our Sighted World?” reveals that despite being such a large population in the U.S. – an estimated seven million Americans – people who are blind are largely excluded from society, leading to massive barriers to finding meaningful employment and living independently.
Tacit project - sonar for the blind (Hand-Mounted Haptic Feedback Sonar Obstacle Avoidance Assistance Device). It measures the distance to things and translates that into pressure on the wrist. From Steve Hoefer at Grathio Labs http://grathio.com/