Video. Researchers at the University of Southampton have been conducting a series of experiments to find out whether the same methods used by dolphins and bats could help blind people to see.
The team have been using both blind and sighted volunteers to see how well they can pinpoint sounds through locating their echo. Mel Bloor reports.
More top news
Philippa has the weekend weather update for the east
Philippa has the weekend weather update for the west
Philippa has Saturday's weather for the east