Then, you must speak clearly into a microphone that has been placed in the right position. If you do this, the computer will hear you just fine, and not get confused by the other noises around you. A second challenge is to recognize speech from more than one speaker. People do this very naturally. We have no problem chatting one moment with Aunt Grace, who has a high, thin voice, and the next moment with Cousin Paul, who has a voice like a foghorn.
People easily adjust to the unique characteristics of every voice.
Speech-recognition software, on the other hand, works best when the computer has a chance to adjust to each new speaker. The training process takes only a few minutes for most people. For a small percentage of speakers, extra training can significantly improve results. If, after you begin using the program, you find that the computer is making more mistakes than you expect, additional training may help. Another challenge is how to distinguish between two or more phrases that sound alike.