Noise quieter/diffuser? I have looked into this comparatively a bit and I...

I have looked into this comparatively a bit and I read that if you have a house where on earth you can hear everything in the floor downstairs you should find a noise diffuser to create white pandemonium. I'm picturing one of those things outside a therapists' office...?
where on earth can i get that?
does that also diffuse my nouns to those below;)
also, yes i have wood floors and i putting down a runner isn't feasible and i really don't want to swing carpets on the wall, i enjoy a really nice place
How regularly do you mop your floor?
Answers:    Is this what you're talking roughly? Good luck!
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