PSYB65H3 Chapter 10: PSYB65 Chapter 10
Document Summary
Research focus 10-1 evolution of language and music. Modern homo sapiens made music early on. Male and females used to sing in duets. Primates were monogamous, singing may relate to sexual behavior. Neanderthals in europe and the middle east had larger brains. Homo sapiens began painting on cave walls 30,000 years ago, near the end of the neanderthal area. 4% of caucasian genes have a neanderthal origin. When a tuning fork is struck, prongs move to the left -> air molecules to the left compress (grow more dense) and vice versa air molecules to the right become more rarefied (grow less dense) Sound waves: energy generated by this displacement of molecules causes waves of changing air pressure. Sound is a creation of the brain. A cycle is one complete peak and valley on the graph (the changing from one maximum or minimum air pressure level of sound waves to the next maximum or minimum level.
