talk without being heard?

This thought was posted on Thinkaloo on 19 March 2008 by member luppo

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imagine you are in a public place, the mobile phone rings and you answer the call right there but you don't want others to hear what you are saying and neither the people around you want to listen to your conversation anyway. what if mobile phones could do lip reading and transmit with your voice what you want to say to the other end?

it often happens in trains and buses in southern europe that people talk loud on their phones and the whole conversation is heard by everyone whereas with lip reading you could lip talk the words without being heard!