EXP 3202C Lecture Notes - Lecture 5: Lip Reading, Midbrain, Cochlear Implant
Document Summary
Lec 5: cochlear implant, fourier synthesis, and auditory cortex: cochlear implant has to have 3 components. The first part- the microphone- replicates the eardrum. It captures any pure sound or complex sound in the environment. Don"t need an outer/inner ear because the batter pack handles that. The microphone is hooked into the microprocessor which is responsible for fourier analysis. The microprocessor has a wire attached to it and it is inserted into the cochlea. There is about 3500 inner hair cells in the basilar membrane. Because the wire can"t be inserted to the apex then a person with an implant can only hear with 24-30 inner hair cells. The stimulating electrode replaces the inner hair cells. Implant is good to hear someone talking, but not much use for anyone else. It is a many to one scenario: region that responds to acoustic elements of speech is wernicke"s area.
