chapter  4
Anatomy of the Human Information System
Pages 20

The organs of visual and auditory perception, the eyes and ears, constitute a complex information system, a network of stations that receive selected signals from the environment either electromagnetically or mechanically (by air vibration), transform them into organized bits of information or codes, and channel them by electrical impulses to the brain. In the brain, these codes are then processed to the appropriate part depending on their nature and particular characteristics where they are decoded, translated, recognized, and assume their meaning. Oversimplified, this is how perception and cognition work.