Society, Politics & Law
Five smart technologies helping the visually impaired
...Open University for BBC Radio 4's sociological discussion programme, Thinking Allowed. Bluetooth Beacons Bluetooth, the technology behind wireless speakers and headphones, has a role to play in navigation for the visually impaired too. Because GPS signals come from satellites, it only works well in open spaces where there is a clear line of sight to the sky. The webs of...