Directional Voice Chat is common in a lot of immersion games, where you hear friends voice chat like it's in real life. Louder the closer they are, and you hear the direction through your headphones as well. Unfortunately 7days voip isn't directional, it's just distance.
I mentioned in my post...
Hi, I play in a group of 5 (including myself), and we're occasionally joined by others. With a buncha people the discord voice chat gets loud and chaotic, and directional voip is something I've been looking into. The voip in 7days doesn't appear to be directional, and it certainly isn't loud...