We think this is really good option for people with a visual impairment as it would allow them to listen to television channels in situations where they may not be able to see the television. Peter Tucic, my esteemed colleague, used the app at a bar over the weekend and said it worked great!
In order to start streaming the audio from the television simply point the phone at the television and take a picture of the screen. Once done, the audio will start playing through your phone. From the website (http://www.tunityapp.com/)