If I have understood the study correctly, it was carried out using headphones on untrained subjects with normal hearing and an average age of 30.
Question?
Under normal listening conditions, with two loudspeakers at a distance of 2 meters, i.e. with sound on-axis and off-axis, and taking psychoacoustics into account, would the result be the same ?
Would this statement """ Small group delay variation and linear phase response result in improved sound quality "" be undeniable in these conditions?
At what threshold would it become audible in these conditions ?
I'm sorry if my questions aren't relevant, but they're not malicious and I just want to understand...