Mr. j_j,
I've read your comments on this forum concerning omnimic limitations in the frequency domain above 100hz. Could that problem be overcome by taking a significant number of measurements at different locations within the listening area and combining them in a sensible way?
Um, that's BELOW 100Hz, but really anywhere below what people usually call the "Schroeder frequency", but most important below 100Hz.
And, yes, by sampling the space you can indeed do the same. It's required by the physics, of course. If you have, say, 4 separate Omni measurements in a tetrahedron as in "DTS Multichannel Audio Playback System: Characterization and Correction", Authors: Fejzo, Zoran; Johnston, James D.
AES Convention:130 (May 2011) Paper Number:8379 you can combine them appropriately as well.