ruairioflaherty said:
Can you tell us more about your tests Riccardo?
How were they configured? Source? etc.
The bandwidth limiting was quite early on in our Blind Listening Test Journey.
Some important landmarks along the way include
http://www.aes.org/e-lib/browse.cfm?elib=2476 Intermodulation Distortion Listening Tests (which was about MUCH more than IMD and includes some of the most important stuff on Audible Speaker Distortions.
http://www.aes.org/e-lib/browse.cfm?elib=2859 Loudspeakers: An Approach to Objective Listening
http://www.aes.org/e-lib/browse.cfm?elib=3798 Absolute Listening Tests-Further Progress
http://www.aes.org/e-lib/browse.cfm?elib=10251 Is Linear Phase Worthwhile?
We got one of Lipsh*tz & Vanderkooy's ABX boxes but the final method we used for nearly 2 decades was an ABC method which allows statistical significance much more quickly. We quickly found out that complicated forms and scoring was counter productive.
Our methods differed in many ways from the false prophets Floyd & Olive. eg our victims chose THEIR own music and set the levels they liked.
When you take care of these and other 'minor'
details you find, unlike Floyd & Olive, that the man (and particularly) the woman in the street as perceptive as 'trained listeners'. But trained listeners usually came to a conclusion more quickly.
The Bandwidth stuff was relatively easy to detect compared to the Phase & Dither stuff.
We never published anything on Bandwidth Limiting but others have.
I'm sorry to be so brief. I could write books on DBLTs but probably never shall. I've provided more details on this and other forums.