... and still there are deviance by a dB or even two in predicted versus real in-room (which?!).
Red = In-room, 4m.
A difference of 1-2 dB is small when it comes to acoustic measurements (we’re not talking about amplifiers or DACs here), and having such a good match between an estimated in-room response based on quasi-anechoic data, and a ”real” in-room measurement shows that the science works.
I measured the in-room response in my living room, without acoustic treatment.