This study pertains to an exploration of man's relationship to his sensory environment. The paradigm employed includes exposing subjects to three 2 1/2 hour sessions of (1) sensory deprivation, (2) normal stimulation, and (3) sensory overload and providing them within limits with an opportunity to regulate the amount and kind of auditory or visual input. This research paradigm permits a way of obtaining "sensory profiles" on subjects. So far, results indicate that mild-to-profound altered states of consciousness or "psychedelic" effects can be produced by sensory overload in about 40% of normal subjects. Also, subjects tend to experience time as "speeded up" in sensory overload and "slowed down" in sensory deprivation as compared to the normal control condition.
Ludwig AM. Self-Regulation of the Sensory EnvironmentConceptual Model and Potential Clinical Applications. Arch Gen Psychiatry. 1971;25(5):413-418. doi:10.1001/archpsyc.1971.01750170029006