Loh, do you hear any difference with or without the shielding?
Lead seems like a reasonable material to try.
I use Mu metal to shield my noise sensitive low level phono gear, works well. It was designed specifically for this purpose in other applications. I think Mu-Metal uses Nickel and Iron mostly, not LEad.
I have read published data on the internet about measured shielding effectiveness of various materials. A google search might be informative.
Lead seems like a reasonable material to try.
I use Mu metal to shield my noise sensitive low level phono gear, works well. It was designed specifically for this purpose in other applications. I think Mu-Metal uses Nickel and Iron mostly, not LEad.
I have read published data on the internet about measured shielding effectiveness of various materials. A google search might be informative.