Sound source localization based on directivity of MEMS microphones

MEMS technology based microphones have gradually been commercialized. These microphones have many virtues of small size, high sensitivity, flexible packaging, and so on. The paper proposes a novel and simple method for sound source localization using the directivity of MEMS microphones. The multi-microphone structure, signal processing algorithm, and system error depression technology of the method are presented. Theoretically, the maximum sound source localization angle error is 2.1/spl deg/ if signal acquirement frequency is 30 times the sound wave frequency.