Microphone array

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A microphone array is any number of microphones operating in tandem. There are 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. Arrays may also be formed using numbers of very closely spaced microphones. Given a fixed physical relationship in space between the different individual microphone transducer array elements, simultaneous DSP ( Digital signal processor ) processing of the signals from each of the individual microphone array elements can create one or more "virtual" microphones. Different algorithms permit the creation of virtual microphones with extremely complex virtual polar patterns and even the possibility to steer the individual lobes of the virtual microphones patterns so as to home-in-on, or to reject, particular sources of sound.

An array of 1020 microphones[1], the largest in the world, was built by researchers at the MIT Computer Science and Artificial Intelligence Laboratory.

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.[citation needed]

Soundfield microphone

The Soundfield microphone system is a well established example of the use of a microphone array in professional sound recording.

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