wayfindr tech guides the blind through London Underground using Bluetooth beacons

In the case of wayfindr, the app picks up the signals of the
three closest beacons, the physical locations of which are
already pre-programmed into the software as waypoints. By
comparing the strength of those signals, the app is able to
triangulate the user’s location relative to the waypoints – it’s
not unlike the fashion in which GPS works, although it utilizes
satellites instead of iBeacons.
From there, the app delivers spoken navigational cues to the
user, via the AfterShokz brand headphones. Because those
headphones work by sending vibrations through the cheek
bones, they don’t block the ear canals, allowing the user to still
hear what’s going on around them.
“What we learned whilst tackling this challenge is that young
vision impaired people cherish their independence, like all
people of their age,” said Umesh Pandya of ustwo. “What we
accomplished with wayfindr is something that will complement
existing efforts by public transport operators to help them
achieve it. We have received incredible feedback about it in
discussions with these operators and a trial is in the offing.”
The University of Nevada, Reno’s Navatar system is also
designed to guide blind users indoors (where GPS doesn’t
work), although it utilizes a combination of digital building
maps, the phone’s compass and accelerometer, and
occasional landmark verifications provided by the user.
More information on wayfindr is available in the following
Sources: Royal London Society for Blind People, ustwo

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