The document discusses hearing and the processes of sensation and perception for sound. It explains that sounds under 4000 Hz are coded temporally through all hair cells firing in sync with the frequency, while over 4000 Hz is coded spatially with different areas of the Basilar Membrane firing depending on the frequency. The Primary Auditory Cortex processes sounds with the right cortex for the left ear and left cortex for the right ear to enable sound localization, which the brain performs without our conscious awareness. Taste is discussed as having basic receptors for sweet, sour, bitter and salty, with combinations of responses leading to other flavor perceptions rather than different tastes being in separate parts of the tongue. Culture also influences taste perception.