Sensory Deprivation Therapy is a common procedure used in torture, interrogation, and re-education procedures, most commonly used by Imperial Security Bureau agents, such as the infamous interrogator Korynn Fleming. Often, SDT is aided by adding precise sensory stimulants. Most commonly this involves the use of a synthesized droning sound, or the forcing open of a subject's eyes followed by the addition of an erratic or static light source. These techniques often quicken the pace in which a subject will reach delirium. From SW1ki, a Wikia wiki.