ARTICLES IN THE BOOK
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A microphone array is a set of multiple microphones operating in tandem. This is shown to have many applications:
Typically, an array is made up of omnidirectional microphones distributed about the perimeter of a space, linked to a computer that records and interprets the results into a coherent form.
There are some implementation of microphones arrays that are really big. At the Massachusetts Institute of Technology, an array of 1020 microphones  has been built.
Microsoft's Windows Vista computer operating system has built-in support for microphone arrays for increasing the accuracy of its speech recognition feature, letting users connect multiple microphones to a single system, so that the inputs can be combined into a single, higher-quality source.