I believe it was mentioned, but here's my thoughts. Someone was talking about ATC announcements and here's my thoughts. It'll take some work, but I feel like sounds should be heard only if you're zoomed into the area, and you only hear the sounds of that area. For instance, at the foot of the runway, you'll hear only spool ups, tire squeals from landings etc, but you wouldn't hear computers or gate agents. In the terminal, you'd hear sounds of gate agents or restaurants... Etc etc etc
I think if you assigned sounds to items, maybe we could hear it? Dunno if it would work, but I feel like it would be cool!