Novel approach
•No theory is assumed: the set of hm,v filters are
derived directly
from a set of impulse response measurements, designed according to a least-squares principle.
•In practice, a matrix of impulse
responses is measured, and the matrix has to be numerically
inverted (usually employing some regularization technique).
•This way, the outputs of the microphone array are maximally close to the ideal responses prescribed
•This method also inherently corrects for
transducer deviations and acoustical artifacts (shielding, diffractions, reflections, etc.)