I came across this word listening to the lectures and reading the books of David Eagleman.
I encountered Dr. Eagleman when i was researching more about the Long Now Foundation. Longnow.org
My operational definition is: the World of Perception. We can use to technology to increase the range of pressure, temperature and electro magnetic stimulus we perceive.
This effectively increases the umwelt of a sonar operators, in a submarine, into perceiving aspects of the world as dolphins and whales do.
Eagleman refers to the brain’s ability to interpret different chemical and electrical inputs as information and build mental models of the world. His laboratory is even developing a haptic vest that can process different data inputs into physical vibrations against your skin. And dramatically reduce the symptoms of tinnitus.
Daniel Kish a blind man who taught himself to ride a bicycle using echolocation is an example.
Eric Weihenmayer, who climbs mountains but has developed a device called a Brainport to convert distances into vibrations on his tongue.