LINGUIST 3F03 Lecture Notes - Lecture 18: Eustachian Tube, Inner Ear, Tympanic Cavity
27 Nov 2018
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Week 9 & 10: anatomy and physiology of hearing. Sound waves are mechanically transmitted by ossicles of the middle ear to the internal ear, which is lled with watery liquid. Ossicles perform conversion of pressure changes from an elastic medium (air) to pressure changes of an incompressible liquid (water) Yes, otherwise the liquid in the internal ear would be not displaced. Yes, he forced generated by the tympanic membrane is not strong enough to move the liquid in the internal ear. Without the ossicles, we won"t be able to hear anything* The middle ear performs a kind of volume control > the muscles of malleus can be tensed, resulting in a low frequency damping. It must be activated through by neural impulses to activate these muscles > in order to be activated as noise control, the noise has to be processed by the internal ear > damage could have been occurred already.
