Sensory deprivation or perceptual isolation is the deliberate reduction or removal of stimuli from one or more of the senses. Simple devices such as blindfolds or hoods and earmuffs can cut off sight and hearing, while more complex devices can also cut off the sense of smell, touch, taste, thermoception (heat-sense), and 'gravity'.
Leonardo da Vinci (1452~1519), the great Italian artist, architect, and man of science, made the first scientific experiments In the field of aviation. He devoted many years of his life to understanding the mysteries of flight, and he left the world 160 pages of descriptions and sketches of flying machines.
On October 14, 1947, he became the first person to fly faster than the speed of sound. De Beeler was an aeronautical engineer for NACA, the predecessor to NASA. He helped design the X-1, which was the first airplane to break the sound barrier. Slick Goodlin was a test pilot for Bell Laboratories and made numerous flights in the X-1 before it was transferred to the military for the sound barrier attempt.