When opening the airlock (killing yourself) ScummVM plays sound effects that the original doesn't. In addition to the two expected sounds (door opening and D'oh) a loud bang sound repeats three times until the scene ends. This bang sounds like the sound that plays when asteroids hit the ship while in the asteroid field, though I'm not 100% on that. The expected behavior is that only the door-opening and D'oh effects play, at least that's what occurs in the original.
Attached are savegames from ScummVM and Sierra SCI at the airlock.
ScummVM 1.7 latest, Win32
SQ5 1.04 English