I once had an issue where my noise-cancelling headphones (but not others) would make some static/buzzing sound when connected to my computer but not to my lapto

I once had an issue where my noise-cancelling headphones (but not others) would make some static/buzzing sound when connected to my computer but not to my laptop. The problem lasted for months. I don’t know how I eventually found out that the PoE adapter I had on the same socket as my computer was causing the interference. Moving it to a different socket in the same room fixed the issue.