Faraday cage for audio
Years ago,. Enid Lumley(who I liked a lot--very nice person). came over to my house and noted after listening that I seemed to have RF problems--which was true. And she suggested enclosing my whole listening room--which was a detached part of the house --in a Faraday cage made of chicken wire. I told her I appreciated the thought but I felt that the neighbors would object. Good idea in principle , however. If one were building a dedicted room for audio....
- Placing overlapping aluminum foil under the wallpaper may leave less leaks than coarse chicken mesh.
If you stand in a full-metal elevator cab, you can still use your mobile phone as the remaining slot between the doors is long enough to get radio reception. The windows of the listening room will be remaining leaks and all mains cables carry RF and act like guides for electro-magneic fields both receiving amd radiating RF..
It is much easier to get good results by placing the electronics in a copperplated cabinet with RF-stoppers over the incoming and outgoing cables.