SLHS 1150 Lecture Notes - Lecture 19: Eardrum, Ossicles, Middle Ear
31 Mar 2017
School
Department
Course
Professor
Document Summary
How we hear: we hear with our brains. How it gets to our brain: the auditory system changes a signal that travels through the air. Into an electrical signal: what we cover today, the outer ear, the middle ear, the inner ear, the auditory nerve, the nerve, and how each one feeds into the other. Outer ear the place where the signal travels through the ear: pinna, anatomical points lobe. Channels sound energy to the tympanic membrane. Impedance: the biggest problem we have in hearing is impedance, the auditory system (esp. middle ear) is especially designed to overcome impedance, an air filled space, houses the ossicular chain, mallelus. Incus: stapes connected to the oval window, 2 windows into the cochlea, connected to the sinus by eustachian tubes, windows, oval window. Provides a point of entry for the stapes to push in: round window.
