Thanks for replying, and I can relate to your desire to take the edge off the tendency to shutdown. I actually have the same problem with certain repetitive sounds. For instance, I can’t stand it when there is a loudly ticking clock and I am trying to sleep. Or when someone is talking and I’m trying to read. It seems that sometimes I am able to tune out such noises, but it doesn’t always work. I haven’t quite figured out why.