App gives paralysed man his voice back
21 February 2013 Last updated at 09:45 GMT
For the last 27 years, Kevin Beverley has been unable to speak, after a violent attack left him brain damaged and paralysed.
But after years of silence, a new computer app has helped him find his voice again.
His first words were "at last, someone can hear me."
Bryony Mackenzie reports.