I have been surviving on a couple of hours of sleep for quite some time now and am fortunate if I get any. I can't remember silence. I've lost interest in many things because it is so difficult to concentrate. I see where some are able, or trying, to mask this sound, but I have found nothing to over power it. I went in for an MRI and was sure it would mask the sounds in my head, but it had no effect. Finding help with this has left me empty.