TY - GEN
T1 - Performance for randomly described arrays
AU - Yu, Jingjing
AU - Donohue, Kevin D.
PY - 2011
Y1 - 2011
N2 - The complex relationship between irregular microphone distributions and its spatial gain hinders the efficient use of beamforming in various applications. This paper examines beamformer performance based on statistical descriptions of microphone geometries. In particular, array centroid, dispersion, and entropy based statistics are used to characterize irregular geometries relative to beamformer focal points. Simulations are performed to determine relationships between geometry descriptors and beamformer performance for speech applications. Descriptors are used in a genetic algorithm (GA) for optimizing microphone placements for various acoustic target and noise source distributions. Results show significant SNR enhancements for optimized irregular arrays over comparable regular arrays. GA objective functions using proposed geometry descriptors, result in rapid convergence to superior performing arrays, indicating a strong correlations with array performance.
AB - The complex relationship between irregular microphone distributions and its spatial gain hinders the efficient use of beamforming in various applications. This paper examines beamformer performance based on statistical descriptions of microphone geometries. In particular, array centroid, dispersion, and entropy based statistics are used to characterize irregular geometries relative to beamformer focal points. Simulations are performed to determine relationships between geometry descriptors and beamformer performance for speech applications. Descriptors are used in a genetic algorithm (GA) for optimizing microphone placements for various acoustic target and noise source distributions. Results show significant SNR enhancements for optimized irregular arrays over comparable regular arrays. GA objective functions using proposed geometry descriptors, result in rapid convergence to superior performing arrays, indicating a strong correlations with array performance.
KW - Microphone array
KW - beamforming
KW - genetic algorithm
KW - optimization
UR - https://www.scopus.com/pages/publications/83455182174
UR - https://www.scopus.com/pages/publications/83455182174#tab=citedBy
U2 - 10.1109/ASPAA.2011.6082273
DO - 10.1109/ASPAA.2011.6082273
M3 - Conference contribution
AN - SCOPUS:83455182174
SN - 9781457706912
T3 - IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
SP - 269
EP - 272
BT - 2011 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2011
T2 - 2011 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, WASPAA 2011
Y2 - 16 October 2011 through 19 October 2011
ER -