Turn off any fluorescent lights, CRT monitors or TV's, and/or lighting system (par 56's or 38's) since these can cause hissing, humming, and buzzing. Always use old-school light bulbs in a small home studio environment since the crappy twisty fluorescent bulbs just cause cancer anyway!
I think you are talking about feedback. Possible to much gain on the mic so adjust or located to close to speakers.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.