PSYC 2200 Lecture Notes - Lecture 14: Ear Canal, Semicircular Canals, Vestibular Nerve
16 Oct 2020
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Document Summary
Frequency is how many times air particles are moving per second. Loudness, sound pressure (spl), measured in decibels (db) Sound frequency (pitch, tone) measured in hertz (cycles per second) Auditory: air molecules vibrate, sound in the air, send vibrating wave in the air. Musical scale and frequencies set differently in different cultures. A plot of frequency x minimum db audible = audiogram. Audiograms can dip into negatives for certain animals. Elephants hear low frequencies that humans don"t -- lower. Acts as a collection for soundwaves and vibrations, narrows and passes them down to. Semicircular canals code vestibular information and send axons to the vestibular nerve which joins with the auditory nerve to become the vestibulocochlear cranial nerve. Doctors can tell if you have an infection because your eardrum may be red or bulging but can"t see into the middle ear. Middle ear infection-- fluid trapped in middle ear that becomes infected.
