Here is an interesting BBC Horizon document about sensory deprivation:

For the first time in 40 years Horizon re-creates a controversial sensory deprivation experiment. Six ordinary people are taken to a nuclear bunker and left alone for 48 hours. Three subjects are left alone in dark, sound-proofed rooms, while the other three are given goggles and foam cuffs, while white noise is piped into their ears.

As the description shows, the other group had mostly visual Ganzfeld recreated for them, whereas the other room got aural (and for a short time, also tactile) Ganzfeld. It would’ve been interesting to see simultaneous aural, visual and tactile Ganzfeld reproduction within a floating tank.

People respond in quite different ways to the isolation experience: as one man hallucinates of a pile of seashells, a woman sleeps happily.

Watch the BBC Horizon document “Total Isolation”.