I did some sound design in my game: https://itch.io/jam/gmtk-2019/rate/461680
It is set in a large map, and I made it so everytime you entered a zone the atmosphere changes
Construction site has machinery, lobby has the chatter of people, the generator room has the sound of pistons, you get the deal.
I also softened the transition so it's not as jarring, and added some small details. Like when the phone rings the guy at the counter actually picks it up.