Fur,
> I have just finished putting in the floor <
In general, a reflective floor is a good thing, but in a small room it must be balanced with a fair amount of absorption on the ceiling. Have a look at the forum FAQ, second in the list on my Articles page:
http://www.ethanwiner.com/articles.html In particular, see the sidebar "Hard floor, soft ceiling" which explains the many reasons a reflective floor is good. Then when you apply absorption to the ceiling, the ceiling will
acoustically be identical to one that's infinitely high. And that's an even better thing!
> It is ringing like crazy down there now <
I bet! Besides the floor/ceiling reflections, I'm sure you also have a problem with reflections between the opposing walls. And that too is easily tamed with absorption.
--Ethan