When I was a kid, I could hear that noise. It was so loud I remember hearing it from outside my classroom once and I knew we were going be watching something on TV.<br>    I don't know exactly when I stopped hearing it. I think over time it just sort of faded away. But by my mid teens it was gone. I always assumed they had designed the squeal out. It wasn't until many years later when my nephew was 8 or 9, he asked me about it. I knew then that the squeal WAS still there, but I could no longer hear it.