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This application of speech recognition is seen as a major alternative to the use of keyboards, and other push-button devices, which can be fiddly ways of driving machines.
It leaves hands free for other work, and enhances access for disabled people who find direct manipulation difficult or impossible. It means that experienced users can cut through layers of menus faster, by referring to options that are not visible on screen.
It also releases designers from the need to leave space for a manageable keyboard or keypad, so enhancing the miniaturization of portable phones and computer terminals.
But it has its drawbacks too. Try controlling a moving vehicle by voice alone ! The machine may be expecting commands in a foreign language, one that you don't know. In a noisy environment, it may be difficult to get the commands recognized by the machine. And when many people are close together, talking to your machine may be seen as antisocial behaviour.
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