Sound Problem (Area Portal?)

[MagSul]

In one of the rooms (I'm sure you can guess which one) I have two NPCs practising their lightsaber techniques against one another. When I walk around the temple, I can hear their occasional taunt, jump and clash and grunt. The area is completely sealed with an area portal, so I'm not sure why this is. Are the sounds global or something? I can hear them from the other side of the map. If that's the case, is there anything I can do about it? I have this problem on the original Yavin Temple in Jedi Outcast too.

 

Is the only solution to rig it in such a way that they despawn/spawn when you leave and enter the said area?

[ensiform]

Is the area portal only on one face of the brush within the doorway? And assuming there's a door of course. It's possible some of the sounds being played aren't affected by pvs at all.

[MagSul]

There is a door, yes, and the area portal is only on one face. The rest of the brush has a system/skip texture on it.