By Chiong Ching Lai, Sven Erik Nordholm, Yee Hong Leung
The e-book covers the layout formulations for broadband beamformer concentrating on nearfield and farfield resources. The publication content material contains history info at the acoustic setting, together with propagation medium, the array geometries, sign versions and uncomplicated beamformer designs. consequently it introduces layout formula for nearfield, farfield and combined nearfield-farfield beamformers and extends the layout formula into electronically steerable beamformers. furthermore, a powerful formula is brought for the entire designs mentioned.
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Extra resources for A Study into the Design of Steerable Microphone Arrays
When operating outside the design specifications, the beamformers start to fail at the low frequencies. e. the discrepancy between the operating environment and the assumptions made in the design formulations. References 1. W. Elko, Microphone array systems for hands-free telecommunication. Speech Commun. 20(3–4), 229–240 (1996) 2. D. M. Buckley, Beamforming: a versatile approach to spatial filtering. IEEE Signal Process. Mag. 5(2), 4–24 (1988) 3. H. Krim, M. Viberg, Two decades of array signal processing research: the parametric approach.
By M. Brandstein, D. Ward (Springer, Berlin, 2001), pp. 19–38 12. V. Trees, Optimum array processing (Wiley, 2004) Chapter 4 Steerable Broadband Beamformer Design Abstract The design formulation for fixed broadband beamformers can be extended to steerable broadband beamformers using a polynomial filter structure to achieve beam steering. The main advantage of a steerable broadband beamformer is that once its coefficients are designed, its main beam can still be steered dynamically without the need to redesign the beamformer weights.
Signal Process. 47(1), 33–40 (1999) 13. D. M. Buckley, Beamforming: a versatile approach to spatial filtering. IEEE Signal Process. Mag. 5(2), 4–24 (1988) 14. J. Dmochowski, J. Benesty, S. Affes, On spatial aliasing in microphone arrays. IEEE Trans. Signal Process. 57(4), 1383–1395 (2009) 15. A. Manikas, A. Alexiou, H. Karimi, Comparison of the ultimate direction-finding capabilities of a number of planar array geometries, in Proceedings of the IEE Radar, Sonar and Navigation, vol. 144, no. 6, Dec 1997, pp.
A Study into the Design of Steerable Microphone Arrays by Chiong Ching Lai, Sven Erik Nordholm, Yee Hong Leung