This paper doesn't strike me as a SCIENTIFIC finding! There are hosts of distortion mechanisms; very numerous. It would seem to me impossible to account for them all, but then that is just an opinion. It is really left up to what people want to listen to and subject their ear-brain mechanism to. Some people like salt, pepper, pickles, and a lot of gravy with their roast beef. For a scientist or engineer to suggest that we are idiots not to like our roast beef dry, with no salt or pickles or gravy is ludicrous. I for one feel if you remove all the distortions from anything, then what you are left with is rather uninteresting to most of human kind. Ray Hughes