The most economical option for mid-high frequency absorption, the thicker the treatment the more mid-low frequency control you gain; a GREAT stock item. An alternative look or substitute for wedges or pyramid.
The differing heights of protrusions on the acoustic Studiofoam Metro products serve to spread sonic energy out in the time domain, as well as each absorbing a slightly different slice of the frequency spectrum. You see, it takes slightly different amounts of time for sound waves to travel through the different sections of the Metro, strike the mounting surface and travel back through the Metro into the room, so wavefronts are in effect softened rather than just being absorbed. This is why a 2" Studiofoam Metro room will retain a bit more "feel" than a room that's treated with a stronger acoustic absorber like 3" or 4" Studiofoam Wedges or Pyramids and why, when coupled with a judicious amount of MetroFusors and Metro LENRDs, a well-controlled, natural-sounding acoustic space will result.
* Please note that due to the variance of different computer monitors and video card color depth, Auralex Acoustics or 305 Broadcast cannot guarantee that the color(s) represented on your computer screen will exactly match the foam products shipped. These color swatches are for reference purposes only.