PHYS 0872 Study Guide - Midterm Guide: Hair Cell, Tuning Fork, Middle Ear
12 Mar 2014
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Science of sound: science of sound: study guide for 2nd test, wednesday, nov. 6, on chapters. The exam will be given in walk auditorium, ritter. There will be several questions on the anatomy and functioning of the human ear. : equalizes pressure on both sides of eardrum. : 2. 5 cm to 3cm long, 1cm dimension, serves as resonance tube. : hammer, ambel, and stirrup, transmit vibrations into inner ear enhancing hearing by around 3,000 to 4,000 hz. : membrane, vibrates in response to pressure changes in a soundwave (can grow back if not burst too badly), lower mechanism amplifies vibrations in middle ear, hydraulic amplification (20 to 25 db increase) 2 parts by basilar membrane (vibrations of oval window lead to vibrations of basilar membrane which stimulate the hair cells) from infections. Lowering of upper limit as one ages (deterioration of hair cells) Damage to ossicle chain or reduced mobility due to extra tissue.
