I’m not sure if it can be apply to you case. But I’m working on audio volume system similar to Unreal. It’s not a ready-to-use solution but I can explain how I approach it if you are interested in details. Main idea is if volumes overlap then I can dynamicaly change level of sound sources from one in another. In this example there is a big “rain” volume and inside there is a room with a door. When you open it, part of a rain sound coming through depending on door rotation.
Sorry if it is not approach you are looking for.