Some ambient sfx play louder than they should
An example of this is the myriad number of ancestral tombs dotting the landscape. There are a number of (invisible) sources therein that play ambient "ghostly" noises. On similar volume settings, OpenMW will play these effects much louder than vanilla Morrowind from the same distance. Whether the radius of the effect is larger or the effect is simply played back louder, I find it hard to tell.
(RM-3674 from redmine: created on 2016-12-18 by August Avatar, , duplicates #4332 (closed))