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.
What the Cost Covers. The basic cost to waterproof a basement averages around $7-$7.50 per square foot in 2014. The estimate is calculated from average material costs, labor, productivity rates and national average hourly labor wages.asement waterproofing can cost as little as $20 for small wall cracks and as much as tens of thousands of dollars for repairs and complete basement waterproofing systems.