PSY 2012 Chapter 3.10: Chapter 3 Module 10 PSY 2012
Document Summary
Eardrum: part of the ear that vibrates when sound waves hit it: vibrations are then transferred into the middle ear containing three bones: hammer, anvil, and stirrup. Inner ear changes sound vibrations into a form transmittable to the brain. Cochlea: coiled tube in the ear filled with fluid that vibrates in response to sound. Basilar membrane: contains sense receptors for sound. Hair cells: tiny cells covering the basilar membrane that, when bent by vibrations entering the cochlea, transmit neural messages to the brain. Physical aspects of sound: frequency: number of wave cycles that occur in a second. Pitch: makes sound seem high or low : amplitude: wave patterns that help in distinguishing loud and soft sounds. Decibels: range between strongest and weakest sounds that can be heard. Place theory of hearing: different areas of the basilar membrane respond to different frequencies: provides explanation for the sensing of high-frequency sounds.
