Design of spatial microphone arrays

G. Chardon, W. Kreuzer, M. Noisternig, Design of spatial microphone arrays for sound field interpolation, accepted in Journal of Selected Topics in Signal Processing, doi:10.1109/JSTSP.2015.2412097 , [pdf]

Double sphere

Microphones lie on two concentric spheres. The radius of the inner sphere and the angular positions of the microphones are optimized to stabilize the interpolation at the critical eigenfrequencies. 100 microphones on the outer sphere (gray), 9 microphones on the inner sphere (red).