Application of Mvdr Beamforming to Spherical Arrays
نویسندگان
چکیده
The minimum variance distortionless response (MVDR) beamforming technique is applied to a spherical microphone array. Therewith optimal spatial filters are calculated. Besides, a freely chosen measure of stability in the calculation facilitates a tradeoff between directivity and noise sensitivity. The beamforming method is compared to the highly directive method of phase-mode processing and the highly robust method of delay-and-sum beamforming. Using MVDR beamfoming, a stable and practical implementation of optimal spatial filters is found in between theses extremes. This finding suggests the consideration of MVDR beamforming in the analysis of sound fields and speech enhancement when applying spherical arrays.
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تاریخ انتشار 2009