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.
However, this can be quite expensive. The national average cost of an exterior waterproofing job for a basement is typically between $8,700 and $14,500, according to Bluebook International, but may be more or less depending on where you live. Search prices in your local area at the Angieâs List Bluebook Pricing Guide.