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.
It's also harder to soundproof a room after it's been built, but not impossible. You can get soundproofing materials for the walls, ceilings and floors. The systems for walls come in a variety of thicknesses â up to six inches for some â so bear in mind you will reduce the space in the room being soundproofed.ou can get soundproofing materials for the walls, ceilings and floors. The systems for walls come in a variety of thicknesses â up to six inches for some â so bear in mind you will reduce the space in the room being soundproofed.