On Monday, 18 December 2017 15:50:35 UTC, Terry Casey wrote:
In article 2d3800f9-3f3e-4303-9f3a-
,
says...

You do know that the human ear can;t detect phase don't
you , no you probbaly don't


Try the following experiment using reasonably decent
equipment.

Use a recording with a well defined stereo image for the
test. Also a mono recording of speech - a newsreader, say
(or a stereo recording where the speech originates from the
centre). It doesn't matter which.

Play both recordings with the speakers correctly phased.

what do yuo mean by correctly phased ?


and
note how you can clearly define the positions of all the
various instruments across the sound stage and also pinpoint
the solo voice in the centre.

Now reverse the phase on one speaker (only) and repeat the
listeng test. You will notice a loss of bass response and be
unable to locate the origin of any of the instruments or the
solo voice.

this is because the amplidues are cancelled out it is how noise cancelling works.

Try this use two signals one 30 degrees out of phase with the other and see if you can tell which is which.
Which is out of phase and by how much it is out of phase.


This was a standard test during the experimental stereo
broadcasts of the 1950s on Saturday mornings that used BBC
TV sound for one channel and the Third Programme for the
other.

This was preceded by the announcer speaking from the centre,
left and right of the sound stage in turn.

But little to do with phase and detecting it.

Just like sticking yuor tongue on he mains you can not detect it's phase.
Take the label of the red, blue, yellow phases yuo can;t tell with a meter which is which, only by comparing two of them can you tell which is at peak and which insn't at that moment in time.