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


COMPARATIVE STUDY OF SPATIAL CHARACTERISTICSOF DUAL MICROPHONE ARRAYS

M. B. Stolbov, T. T. Quan


Read the full article  ';
Article in Russian

For citation:
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


Abstract
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

References
1. Microphone Arrays. Ed. by M.Brandstein, D.Ward. Heidelberg, Germany, Springer-Verlag, 2001, XVIII, 398 p. doi: 10.1007/978-3-662-04619-7
2. Vary P., Martin R. Digital Speech Transmission: Enhancement, Coding and Error Concealment. John Wiley & Sons, 2006, 644 p.
3. Benesty J., Chen J. Huang Y. Microphone Array Signal Processing. Berlin, Germany, Springer-Verlag, 2008, 240 p. doi: 10.1007/978-3-540-78612-2
4. Benesty J., Сhen J. Study and Design of Differential Microphone Arrays. Berlin, Germany, Springer-Verlag, 2012, 184 p. doi: 10.1007/978-3-642-33753-6
5. Benesty J., Chen J., Pan C. Fundaments of Differential Beamforming. Springer, 2016, 122 p. doi: 10.1007/978-981-10-1046-0
6. Benesty J., Cohen I., Chen J. Fundamentals of Signal Enhancement and Array Signal Processing, Wiley, IEEE Press, 2017, 440 p.
7. Buck M., Wolff T., Haulick T., Schmidt G. A compact microphone array system with spatial post-filtering for automotive applications. Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2009), 2009, pp. 221–224. doi: 10.1109/ICASSP.2009.4959560
8. Zhang H., Fu Q., Yan Y. A frequency domain approach for speech enhancement with directionality using compact microphone array. Proc. 9th Annual Conference of the International Speech Communication Association (INTERSPEECH 2008), 2008, pp. 447–450.
9. Fischer S., Simmer K. An adaptive microphone array for hands–free communication. Proc. IWAENC-95, 1995, pp. 1–4.
10. Bitzer J., Simmer K.U., Kammeyer K.-D. Multi-microphone noise reduction techniques for hands-free speech recognition — a comparative study. Proc. of Workshop on Robust Methods for Speech Recognition in Adverse Conditions (ROBUST 99), 1999, pp. 171–174.
11. Bitzer J., Kammeyer K., Simmer K. An alternative implementation of the superdirective beamformer. Proc. IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPLAA’99), 1999, pp. 7–9. doi: 10.1109/ASPAA.1999.810836
12. Lotter T., Vary P. Dual-channel speech enhancement by superdirective beamforming. Eurasip Journal on Applied Signal Processing, 2006, pp. 1–14. doi: 10.1155/ASP/2006/63297
13. McCowan I.A. Microphone Arrays: A Tutorial. Available at: http:// www.aplu.ch/home/download/microphone_array.pdf (accessed: 13.01.2020).
14. Microphone Array Beamforming. Application Note AN–1140. Available at: http://www.invensense.com/wp-content/uploads/2015/02/ Microphone-Array-Beamforming.pdf (accessed: 20.12.2019).
15. Designed Optimized Microphone Beamformers. Available at: https:// dspconcepts.com/sites/default/files/voice_ui_part2.pdf (accessed: 13.01.2020).
16. Buck M., Rößler M. First order differential microphone arrays for automotive applications. Proc. 7th International Workshop on Acoustic Echo and Noise Control, IWAENC, 2001, pp. 19–22.
17. Stolbov M.B., Perelygin S.V. Algorithms of a two-element microphone array for speech enhancement in presence of coherent interference. Digital Signal Processing, 2017, no. 4, pp. 34–39. (in Russain)
18. Elko G.W., Pong A.-T.N. A steerable and variable first-order differential microphone array. Proc. IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 1997, pp. 223–226. doi: 10.1109/ICASSP.1997.599609
19. Buck M. Aspects of first-order differential microphone arrays in the presence of sensor imperfections. European Transactions on Telecommunications, 2002, vol. 13, no 2, pp. 115–122. doi: 10.1002/ett.4460130206
 


Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Copyright 2001-2020 ©
Scientific and Technical Journal
of Information Technologies, Mechanics and Optics.
All rights reserved.

Яндекс.Метрика