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@andreasmaaan
I have this thread where I go over the basics of the scores for anyone wanting a quick overview (with a link to the patent as well). The AES paper is also freely viewable and downloadable, it for sure is a bit less confusing in some instances (like LFX stating in the patent that the Sound Power curve ”may be used” compared to the AES paper stating it “is used”, so it‘s not an optional aspect).
Thanks @MZKM.
Was that the link to the AES paper that you intended to post? It relates to headphones. I would have suggested these two loudspeaker papers instead:
It is interesting that none of those have a PIR dispersion hitting -1.75 let alone past that.
He must of used a good deal of speakers with horns.
As you note, it would seem very odd if that were the case. Olive states in the second AES paper:
Test One includes mostly 2-way designs whereas the larger sample includes several 3-way and 4-way designs that tend to have wider dispersion (hence smaller negative target slopes) at mid and high frequencies.
Hardly seems that he is talking about horns here.