The message
from tony sayer contains these words:

The distance does matter, in radio studios for example we sometimes use
panes that are around Six to Eight inches apart as well as being angled
or sloped relative to each other, but this is to improve the reflections
within the studios.

I should expect having the glass sloped relative to each other would
make a difference to sound transmission as well.

--
Skipweasel
Pay no attention to that man behind the curtain.