Discuss about speech recognition in home, how does it work, flaws in it, and how it helps

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Discuss about speech recognition in home, how does it work, flaws in it, and how it helps disable people. How speech recognition work in cars (multi-media system and driving with voice command [we know this is under research such as Google cars which takes people from point A to point b with only voice command]),
How does it work, flaws in it and how to overcome it. How speech recognition work in flights and war planes, how it works, flaws in it and tell why speech recognition is bad idea in flights. We should also state the possible solution for the above stated flaws.
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