As I do my research on sleeping, more on the feeling of it; shutting down, floating, silence, I want to create a space that I would translate those feelings through my project so I searched how others created it then I came across to an experiment and also a therapy method.    

  

  It is called sensory deprivation, there are many different experiments with many different purposes. In 1954, neuroscientist John Cunningham Lilly invented the first sensory deprivation tank.  The real purpose of the sensory deprivation tank, also known as the isolation tank, was to study human consciousness and enhance the efficiency and dominance of the brain without the external stimulus as much as possible. To deactivate all the senses and the external stimulation, subject gets in a pitch-black, soundproof tank half filled with highly salted, body temperature water so they float effortlessly and since the water is body temperature they can't really feel its existence.

   

  Rather than using the tanks for relaxation and serenity, Lilly was focused on mind travel and exploring alternate realities. Later he continued experimenting while on psychedelic drugs. On his interspecies communication research, he experimented on dolphins and communication between humans and dolphins through the deprivation tanks. 

 

   He said; "In the province of the mind what one believes to be true, either is true or becomes true within certain limits. These limits are to be found experimentally and experientially. When so found these limits turn out to be further beliefs to be transcended. In the province of the mind there are no limits. However, in the province of the body there are definite limits not to be transcended."

 

  When he was asked what isolation tank is, he answered; "The idea is to separate yourself from society through the solitude and confinement of a scientifically controlled tank. There should be only 10 inches of water, heated to 93° F—just right for maintaining the proper brain temperature—with enough Epsom salts so that your hands, feet and head all float. Lying on your back, you can breathe quite comfortably and safely, freed from sight, sound, people and the universe outside. That way you can enter the universe within you."   

  

  There are now plenty of flotation centres. Sensory deprivation tank therapy is said to produce several effects on the brain, such as hallucinations to enhanced creativity. As people float weightless in the darkness, silence and no sense of touch it lets the brain enter to a self-oriented and more relaxed state. It supposedly helps with the anxiety disorders, depression, sleep disorders, chronic pain etc.