I think momentarily over the theory of the punctiform acoustic source.

Since each box has a periodical phase shift, also the virtual origin of the source changes with the frequency. One has then the impression that with deep frequencies the acoustic source is further in front in the area.

Thus the signal would have to be corrected. My considerations go by that that you have to split the signal into partial windows and with a fractionale fourier transformation the phase position could be corrected for each step separately. This would have to be a kind of Signalprocessor or a PC which is quick enough to split the signal in smallest possible parts. What do you think about? Are there already such devices?

Greetings
Ralf