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.
Embraer stands on the proud shoulders of Brazilian aviation pioneers whose work dates back to the early 18th Century and the dawn of powered flight. The father of Brazilian aviation, Alberto Santos-Dumont, is heralded as the first person to make a controlled flight in an engine-powered air vehicle, the Hydrogen Dirigible No. 1, in 1898.