I was just on your coping thread and thinking this.....could you get a pet? I use my cats a lot for reality testing. If the one who can still hear doesn't react to something I'm hearing that's a good sign that it's not there. If he does react then I know it's probably the chipmunk that lives in the crawl space above my house. I've even woken him up to see if he hears something before. I also know that nobody is in my house when he is acting normal.