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.
Hanes spent about $4,000 on the project. And while the results in this roughly 10â² x 10â² room arenât perfectly soundproof, he feels it is a major improvement. âThe low end is not completely isolated, and out in the house you can hear the muffled sound of someone drumming.