The process of converting one form of energy into another form that our brain can use is called transduction. Transduction is rather like translation - the sending of physical energy, such as light waves, into the brain's electrochemical language. How do we see? Hear? Feel pain? Taste? Smell? Keep our balance? In each case, one of our sensory systems receives, transforms, and delivers the information to our brain. The field of psychophysics studies the relationships between the physical energy we can detect and its effects on our psychological experiences.