01:119:195 Lecture Notes - Lecture 11: Language Disorder, Cochlear Implant, Cochlear Nerve
27 Mar 2018
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Document Summary
Electrode inserted into cochlea and stimulates/connects to cochlear nerve. Human ear has 3000 channels of hearing. Ci original software had 8 and then 16 channels. Music has a much larger frequency range more difficult to hear. Infants can hear a much higher range. Variations in air pressure due to vibrations. Frequency of sound wave = number of cycles per second (hz) Have outer and inner hair cells which sit on the basilar membrane. Auditory nerves are connected to inner hair cells. Basilar membrane and inner hair cells vibrates up and down. Tectorial membrane and outer hair cells bend back and forth. The bending of the hair cells released neurotransmitters and releases electrical signals. Loud sounds damage hair cells, usually outer hair cells. Human hearing- 20 hz to 20000 hz. High amplitude- large changes in air pressure. Low amplitude- small changes in air pressure. Cochlea- translate mechanical waves into electrical signals.
