Second sight: The Tacit Project glove
From: Computerworld - 11/16/2012
By: Brian Nadel

A serial inventor, Steve Hoefer, is working on helping the blind see with
sound. His Tacit Project is a fingerless neoprene glove that uses sonar and
haptics to help the wearer avoid physical obstacles. It can sense objects up
to 10 feet away with an array of transceivers that measure the time gap
between sending out ultrasonic pulses and receiving their reflection. 

The 3 oz. glove translates the data into a virtual map of what lies ahead,
applying gentle pressure on the wrist to alert the wearer that something's
ahead. You can't buy it, but you can build one yourself for roughly $90 in
parts. 

Photo and source:
http://www.computerworld.com/slideshow/detail/74332/Wearable-computers--The-next-generation?source=CTWNLE_nlt_thisweek_2012-11-26#slide11

Links:
Meet the Tacit Project. It’s Sonar for the Blind (with video 1:06)
http://grathio.com/2011/08/meet-the-tacit-project-its-sonar-for-the-blind/

Grathio Labs
http://grathio.com/