Just for clarification, if your wood floors are over concrete then they are not suspended. Correct? Suspended means on floor joists, "suspended" over a crawl space or basement. Right? I didn't think it could be both on concrete AND suspended, for your typical residential home.
Maybe he meant to say "floating". I think that's what they call laminates and hardwoods with a pad or other kind of layer between the surface flooring and the subfloor. Maybe that's what he's talking about?
In my last house I had laminate floating over concrete, and had good luck using the threaded gliders for my speaker stands, and square dots between monitor and stand. Basically, if you have a floor that can vibrate (like suspended, or floating floors), decoupling is a good strategy.