Performance Evaluation of Directional Microphones

  IJETT-book-cover  International Journal of Recent Engineering Science (IJRES)          
  
© 2020 by IJRES Journal
Volume-7 Issue-6
Year of Publication : 2020
Authors : Wen-Kung Tseng
  10.14445/23497157/IJRES-V7I6P103

MLA 

MLA Style: Wen-Kung Tseng  "Performance Evaluation of Directional Microphones"International Journal of Recent Engineering Science 7.6(2020):19-22. 

APA Style: Wen-Kung Tseng. Performance Evaluation of Directional Microphones  International Journal of Recent Engineering Science, 7(6), 19-22.

Abstract
Directional microphones are used in popular car multimedia systems, such as CAR PLAY and ANDROID AUTO. The driver can command the microphone to control the car multimedia system. The directional microphone can also improve speech recognition accuracy and prevent the microphone from receiving noise from outside the car. This research improves microphone array directivity. Delay-and-sum beamforming combined with the optimization method is used in this study to achieve the desired effect of the directional microphone array. An array of 57 circular microphones is used in the study. The results show that the proposed method significantly improves microphone array directivity.

Reference
[1] L. E. Kinsler, A. R. Frey, A. B. Coppens, J. V. Sanders, Fundamentals of Acoustics .John Wiley, 2000.
[2] M. Brandstein, D. Ward, Microphone Array: signal processing techniques and applications . Springer, 2001.
[3] D. H. Johnson, D. E. Dudgeon, Array Signal Processing: Concepts and Techniques. Prentice Hall, 1993.
[4] Roland Aubauer, Dieter Leckschat, Optimized second-order gradient microphone for hands-free speech recordings in cars, Speech Communication, 34 (2001) 13-23.
[5] Gary W. Elko, Microphone array systems for hands-free telecommunication, Speech Communication, 20 (1996) 229-240.
[6] Mohammad Almanee, A High-Efficiency Diver-to-Diver Optical Communication System SSRG International Journal of Electronics and Communication Engineering 6.9 (2019): 14-17.
[7] S. Ohyama, Y. Sasagawab, J. Takayama, A. Kobayashia, Enclosed microphone array system with point-listening characteristics based on adjustment of complex weighting, Sensors, and Actuators, 126 (2006) 348-354.
[8] J. Nordholm, I. Claesson, M. Dahl, Adaptive Microphone Array Employing Calibration Signals: An Analytical Evaluation, IEEE transactions on speech and audio processing 7 (1999) 241-252.
[9] M. Bucka, T. Haulicka, H. J. Pfleiderer, Self-calibrating microphone arrays for speech signal acquisition: A systematic approach, Signal Processing, 86, (2006) 1230-1238.

Keywords
Microphone array, directivity, delay-and-sum beamforming, optimization method, circular microphones.