SOCI 1001 Lecture Notes - Basilar Membrane, Oval Window, Tectorial Membrane
Document Summary
Frequency: number of cycles per unit time. Amplitude: height of the wave at it peaks. Pinna and auditory canal channels and amplifies sound . Which leads to vibration of tympanic membrane, which in turn causes the vibration of the ossicles and then oval window . Waves continue to inner ear, compromised of cochlear fluid; causing basilar membrane and tectorial membrane to flex and vibrate at frequency of wave (e. g. , 100 hz sound wave = basilar membrane vibrates 100 times a second); hair cells on the basilar membrane at the organ of corti shear, stimulation neurons that form the auditory nerve and transmitting info to the brain. Hairs of varying stiffness are sensitive to different frequencies. Size of wave depends on the amplitude of sound. The bigger the wave the more activity among hair receptors the louder the sound. Place theory: for moderate to high frequencies place of maximal wave depends on frequency of sound.
