"ludovic mirabel" wrote in message
news:uCJLa.56660$Ab2.130013@sccrnsc01

(KikeG) wrote in message
et...

(ludovic mirabel) wrote in message
news:bn2La.36126$Ab2.61637@sccrnsc01...

I haven't read Greenhill's tests report, but it seems there's some
controversy over what you are saying. Even if that was true, that
would suggest there were some problems at the test, since anyone of
my family could ABX that wideband level difference quite easily.

Enrique (Kike For friends)

Apologies for dealing just with this for the time being . It concerns
intellectual honesty something I happen to be touchy about.
The " Cable test's (" Stereo Review",Aug. Â'83) proctor and reporter
was immaculately "objectivist" L. Greenhill- still alive and writing
for "The Stereophile"

Looking at the calendar, I see that in two months it will be 20 years since
this test was published. Considering editing and publishing delays, it's
already been 20 years since the test was done. If this were the only test
that was done in the history of man, or if every other or the vast majority
of DBTs that were done since then agreed with its results, then citing it
would make some sense. Regrettably, DBTs and even ABX tests involving level
differences have been done many times since then, and very many of those
listening tests have provided far more sensitive results.

Therefore, discussion of Greenhill's 1983 test as if it were indicative,
representative or binding on what's happening today is futile and
misleading.

Anybody who wishes to do DBTs to investigate the audibility of level
differences can do so easily using files they can freely download from the
PCABX web site. I think it would be interesting for people to report the
results they obtain with those files.

IME the audibility of level differences for people with normal hearing and
typical listening environments is closer to 0.5 dB than the 1.75 dB reported
by Greenhill.

Since individual listeners have different test environments and different
ears, their results can be reasonably be expected to vary.

In fact if the results didn't vary, it would suggest that there is
something wrong with the test procedure since it would not be demonstrating
the existence of well-known differences in individual listening acuity.
However, it is equally well known that some place around level differences
of 0.2 dB, nobody hears nuttin'.