Ge. Lancioni et al., USE OF AN ACOUSTIC ORIENTATION SYSTEM FOR INDOOR TRAVEL WITH A SPATIALLY DISABLED BLIND MAN, Journal of visual impairment & blindness, 90(1), 1996, pp. 36-42
A simple acoustic orientation system was built for indoor travel and a
ssessed with a blind man who had difficult moving at home and at work.
The results showed that the system helped the man move successfully (
and perform activities) in both contexts and that the man was eager to
use it.