From Richard Hind
James Fenton writes to ask a very reasonable question: why not use movement sensing cameras to allow computers to lip-read (20 July, p 29)?
As anyone who has learned sign language or taken a Deaf Awareness course will know, even the best lip-readers can only pick up at most 40 per cent of what is said from lip-reading alone.
To investigate this for yourself, ask your partner to lip-read while you mouth the words “elephant juice”. It might just make their day!
York, UK
