Something similar to this for old wood structures:
Buildings that are huge like warehouses or malls to have some kind of echo effect when walking or shooting.
A cool feature would be echo travel time,for example An underground mine is large,lets say something happens at the end of the furthest point and creates a noise,if the player is at the start of the mine it will be some kind of sound delay.
This is a hard to make feature so maybe wont be added into the game(and i don’t blame).