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, directional microphones, or a mix of omnidirectional and directional 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 until August 21st 2014, was built by researchers at the MIT Computer Science and Artificial Intelligence Laboratory.

Currently the largest microphone array in the world was constructed by Sorama, a Netherlands based sound engineering firm, in August of 2014. Their array consists of 4096 microphones. [2][3]

Soundfield microphone[edit]

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

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