And because human vocal patterns are as varied as humans, with individuals having different accents and inflections, voice recognition software must typically be trained to identify the way words are spoken by a particular user. It obviously gets trickier when the voice recognition software has to figure out what you said in a larger context. In situations where the only options are "Yes" and "No" it's a lot easier for a computer to figure out which word you said, because they sound quite different. So by examining the "voiceprint" of a spoken word or phrase, and comparing it to the sound waves created by speaking specific utterances, the computer can make a pretty good guess at what you said. Sound travels in waves, and the range of sounds we can hear are created by changing the height (amplitude) and frequency of those waves. How Does Voice Recognition Work? Without getting too terribly geeky, a person's voice is translated into a digital format that a computer can read. Also, more and more vehicles are now coming equipped with voice recognition computers that let the driver operate the radio, CD player, or a cell phone. You can answer "Yes" or "No" or other specific phrases to questions that the voice-activated system asks, rather than pressing "1" for "Yes" or "2" for "No".
A lot of companies, especially telecom providers, are already using voice-recognition when you call their customer service centers. Even though it's not used by many on their home PCs, you probably have already encountered this type of data input. Though it may seem like a futuristic notion, voice computing or speech recognition has been around for over a decade, and is still a rapidly evolving technology. Simply put, voice recognition software allows you to speak commands to a computer rather than use a mouse or keyboard.
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