Title :
Optimum near-field response for microphone arrays
Author :
Ryan, James G. ; Goubran, RaJk A.
Author_Institution :
Inst. for Microstruct. Sci., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
This paper describes the effects of optimizing the weights of an arbitrary microphone array for near-field target locations. Optimum near-field weights are shown to provide increased gain for near-field sources when compared to a uniformly weighted delay-and-sum beamformer. Practical improvements in array gain due to constrained optimization are shown to be greatest at locations close to the array and for microphone spacing which is small in relation to the operating wavelength
Keywords :
acoustic signal processing; acoustic transducer arrays; array signal processing; microphones; optimisation; constrained optimization; gain; microphone arrays; microphone spacing; near-field target locations; operating wavelength; optimum near-field response; uniformly weighted delay-and-sum beamformer; weights optimization; Acoustic noise; Acoustic propagation; Array signal processing; Constraint optimization; Councils; Delay; Microphone arrays; Position measurement; Process design; Sensor arrays;
Conference_Titel :
Applications of Signal Processing to Audio and Acoustics, 1997. 1997 IEEE ASSP Workshop on
Conference_Location :
New Paltz, NY
Print_ISBN :
0-7803-3908-8
DOI :
10.1109/ASPAA.1997.625630
