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.
Generally, the typical room insulation costs will include: 1  The Ceiling or Attic - the costs for insulating the attic area to modern standards are from $1 to $1.50 per square foot. This assumes that it is a DIY project and uses R49 value insulation.