Audio Tunnel Sound & Pink Box

How can I use these boxes/what are the called?

 

Just found out, that those are weather occlusion boxes, but still, how can I change the audio in tunnels?

 

Yeah I found out already...

 

lmao.

 

Care to share your discoveries? It would be nice to add this to our growing collection of unofficial documentation.

 

When I have time, I‘ll do it.

 

2TallTyler
https://forums.dovetailgames.com/threads/create-sound-occlusion-for-tunnels-underpasses-etc.81296/