While the trichromatic theory defines the way the retina of the eye allows the visual system to detect color with three types of cones, the opponent process theory accounts for mechanisms that receive and process information from cones.
Cost of Soundproofing One Room. The cost to soundproof one room generally includes $170 to $250 for new materials, $190 to $300 for professional labor and $20 to $36 in tools needed to complete the job, though the prices will be higher for larger rooms and more complicated projects.
In 2011, the average cost per bedroom was $1,141. This is a much greater increase than inflation. The [Consumer Price Index] in June 2011 was 225.922 while the December 2012 one was 229.594, so you would expect $767/room then to turn into $780/room now instead of the $895 we actually see.n 2011, the average cost per bedroom was $1,141. This is a much greater increase than inflation. The [Consumer Price Index] in June 2011 was 225.922 while the December 2012 one was 229.594, so you would expect $767/room then to turn into $780/room now instead of the $895 we actually see.