i really think if the frame gets that loud when it's fully upgraded, built walls and other items with solid collision should be able to muffle sound just like map geometry, i really hate it that you have to spoil how an entire area or room sounds because of how loud it is without any way to muffle it
i would suggest adding plugs to somewhere like the bunker but, telling from how you can't turn the lights on in there i doubt the bunker has power, as well as the fact that some also want to try and use the bunker as a room too