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.
The least you can spend on a DIY sensory deprivation tank is about $1000 for materials and about $1000-$1200 for plumbing alone. An average type of DIY tank would cost you about $3000 which is already twice the price of the Zen Float Tent. Finally, something you might consider an advantage is the soundproofing.