Exterior Ambient Zone Settings are ignored by sounds played that are placed within the Audio Volume.
As the documentation suggests, Ambient Zones define how Sound Actors located inside the associated Audio Volume will be altered by the Player's location. The settings for the Ambient Zone can also be adjusted from the Details panel.
This means when traveling outside the Audio Volume any sounds that are playing should not be heard if the Exterior Volume is set to 0.0
Regression?
This is not a regression.
1. Download and Open attached project.
2. Press PIE
3. Press the 'P' key to play the Sound Cue placed in the level.
4. Move outside of the Audio Volume
Outcome The sound still plays even with the exterior volume settings set to 0.0
Expected As long as the sound being played is placed within the Audio Volume, the sound should not be heard outside the volume.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-35423 in the post.