@OP, there is a lot of nonsense being sprouted here through misunderstanding. Absorption in a room is necessary to reduce the time it takes sound to decay but the absorption needs to work over as wide a bandwidth as possible.
If sound is left to decay in an untreated room the result is smeared sound, congestion and loss of detail and nuance.
A carpet is, because of its limited thickness, a narrow-band absorber, and if you have wall to wall carpet as I see you do, then you will be absorbing only a limited frequency range and because there is so much carpet there will be information lost, resulting in an imbalanced sound.
Successful treatment is achieved by broad-band absorption.
@artemus_5 mentions finding hard floor and a rug helped.
@fatdaddy2 described a simple experiment which is a good idea. The sheets of plywood will negate some of the damage of wall to wall carpet. I favour a broad-band absorber on the ceiling preferable to carpet as a means of dealing with floor to ceiling absorption. This makes more sense if you consider that the human ear has evolved to allow for floor reflections.