The floor should be treated differently because it is really close to the drivers and your ears and reflections off the floor will be the FIRST to hit your ears and smear your sound. The walls are generally further away from the drivers.
The other posters are correct in saying that thicker is better. Furthermore, you should use cotton or wool padding because the fibers will be of irregular length and diameter and will absorb relatively uniformly across the spectrum. Man-made materials are very consistent and will give a peaky absorption/reflection pattern. Enjoy.
The other posters are correct in saying that thicker is better. Furthermore, you should use cotton or wool padding because the fibers will be of irregular length and diameter and will absorb relatively uniformly across the spectrum. Man-made materials are very consistent and will give a peaky absorption/reflection pattern. Enjoy.