So I'm at work right now and I had my shooting ear plugs with me which block out 33 dB. I decided to put them in cuz of distractions, and now when I type, I don't hear anything, I just FEEL. It's awesome.
I'm typing this on my RealForce 87U 55g. The keys feel heavier for some reason. Maybe because there's no audible feedback. It feels thockier than usual. Try it out and tell me how it goes on your favorite board.