I think this article will help
https://www.anvilfire.com/21st-century-blacksmithing/getting-started/blacksmithing-law/
This is the initial creation of the Blacksmithing community in the Lemmy environment.
I think this article will help
https://www.anvilfire.com/21st-century-blacksmithing/getting-started/blacksmithing-law/
No real advice but the smoke from the coal was my main concern when I was trying to do it in my backyard. Your local laws will be what you need to look at, but sound is not going to be your main issue imo.