Comment sonar cane helps blind navigate (Score 1) 227
On a related note, Nature Science Updated recently had this article:
http://www.nature.com/nsu/030908/030908- 2.html
"A bat-inspired sonar walking stick could help visually impaired people sense their surroundings."
http://www.nature.com/nsu/030908/030908
"A bat-inspired sonar walking stick could help visually impaired people sense their surroundings."
