Here is a basic starting idea on how I wanna implement this…
a user (blind) will have a smartphone with app pre-installed and running and always listening to user.
User will be wearing a good quality surround sound headset.
on user’s command, narrator will speak about the exact current location of user with reference to some other locations
Then a wave of sound signals will start either in all direction giving user an idea of the area or is signal direction pointing towards the target location, may be user’s home.
for first kind of signals, a specific number of tones will start beeping with similar characteristic, the number will depend on the direction user can take. The tone will gradually start to faint giving an idea of moving away and can change point in sound space showing may a curve of turn on the road
second kind of signal will propagate only in the direction of target location.