CSD 212 Study Guide - Midterm Guide: Incus, Active Transport, Stapes
22 Dec 2017
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Document Summary
The auditory and vestibular systems (hearing and balance) Sound | a perception generated in our brains waves of atmospheric pressure changes. Frequency (hz): number of compressed or rarefied patches of air that pass by our ears each second. 1 cycle of sound = distance btwn successive compressed patches. Air molecules are pressurized and try to escape, creating areas of high and low pressure known as sound waves. All sound waves propagate at the same speed: high-frequency sound waves = compressed waves. Requires 1) pressurized sound wave, 2) hair cell. Intensity: diff. in pressure between compressed and rarefied patches of air. Determines the loudness = perception based on sound"s frequency/pressure level: loud sounds have higher intensity. Audition sense of sound: pressurized sound wave (stimuli, hair cell (receptor) Auditory space = area extending around the head in all directions that is used to perceive sound.
