Back in the days of CGA monitors, there was one room at work that I couldn't go into, and that was the CAD room. A dozen CGA monitors made an ear-splitting racket to me. Today at age 61, I can still hear the TV flyback transformers although not as loud as before. Fortunately, LCD screens don't have this problem. (BTW, when I was a kid, I listened to classical music so I didn't damage my ears.)