GE CLST 73A Lecture Notes - Lecture 10: Oval Window, Cochlea, Eardrum

• School: UCLA
• Department: General Education Clusters
• Course: GE CLST 73A
• Professor: Chandler, S.H.

Document Summary

Sin waves represent vibrations in the air. Lower frequency = lower pitch, higher frequency = higher pitch (hz) In ones voice, there are many different frequencies going off at once, not just one simple sin wave. Pure tone is what a simple sin wave sounds like. Sound is one of the signals that our sensory system picks up. External ear (pinna)- collects sound waves and amplify it a little. Animals can move/orient their ears to pick up sounds better, humans cant. 3 little bones malius, incus, stapies (hammer, anvil, stirrup) Sound vibrations move the hammer, which moves the anvil, which moves the stirrup which taps the entrance of the oval window of the cochlea. Cochlea- filled with fluid, so when its tapped the fluid moves and the brain picks up the signal from here via hair cells in the cochlea then turns it into action potentials.