If a tree falls in the forest and no one can hear it, does it matter if you have a noise floor of -80dB? You keep quoting tests you've done yourself with no oversight, and I've already said that I don't believe that you've been totally honest in your tests. You've already burned that bridge. Get an impartial third party to oversee your tests and I'll listen to results of tests of your hearing ability. For now, I think you've been remarkably disingenuous with us.