DOI: 10.17586/2226-1494-2020-20-1-147-154


M. B. Stolbov, T. T. Quan

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Stolbov M.B., Quan Trong The. Comparative study of spatial characteristics of dual microphone arrays. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2020, vol. 20, no. 1, pp. 147–154 (in Russian). doi: 10.17586/2226-1494-2020-20-1-147-154

Subject of Research. The paper considers spatial and frequency characteristics of broadside and end-fire microphone arrays with two omnidirectional microphones and various processing algorithms. Methods. The study of delay and sum algorithms and differential algorithms is performed using known and obtained analytical expressions for transfer functions and directivity coefficients of microphone arrays. Main Results. It is shown that the differential algorithms have substantial advantage as compared with delay-and-sum algorithms in noise attenuating both from point and spatially distributed sources. Practical Relevance. The results may be used in the design of compact microphone arrays and microphone arrays with a large number of microphones.

Keywords: dual-microphone arrays, directional pattern, spatial response, differential microphone arrays, directivity index

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