I'm working on a project in which the interior scenes have 2 different perspectives: 2 men sitting at a table close to the exit door (always shut) and 1 man sitting at the bar listening to their conversation, less closer to the door. I've lay a subtle background for the exterior for start and been playing a bit with its volume automation. I tried first to cut 3 dB whenever the man in the bar appears but this turned out confusing. I'm trying now to use volume background depending on which sensations we want to provoke, growing up as the story moves along.
I wonder how you use to manage this kind of balance with backgrounds!