I'm pretty sure that most people will give the "don't do that" knee jerk thing, but stop me if I'm wrong. The problem only exists when opening or closing the door. The problem exists because the rooms are air tight. Like the sound a large freezer door makes when it opens and the differential in air pressure/temp whistles through insulation gap (soft material against hard and/or soft letting the pressure push past). Kind of sounds like the lift doors on the Enterprise, yes?
There are two viable options. Change the way the doors open/what is contacting when they open, or vent the rooms.
Because the door is sealed tight, opening the door by moving it in or out of the room will vary the pressure in the room, raising or lowering the pressure makes the air rush in or out of the room. If you can modify the door to slide from side to side, you would do away with the air pressure differential. However, finding quiet rollers and pocket (or pressure) seals for a sliding door may be excessive on the pocket.
Venting the room may be as simple as drilling some holes (say at the top back of the room on the inside and on the bottom back of the outside, just as an example) so the room is no longer air tight, but maintains 99.8% of it's isolation.
Best I can come up with with my limited knowledge...