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open.Audio Algorithms and Hardware Slide 11
The demonstration shown in the image is based on four coupon boards in a matrix implementation (2x2). The mic itself is omnidirectional. With the demo it is possible to perform beamforming to select a voice or sound in one specific direction. This algorithm, based on four mics achieves a beam selectivity of about 45°. With the same hardware and the library for sound localization, the angle of arrival of the audio signal can be detected.
PTM Published on: 2016-06-13