PSYC 3325 Study Guide - Midterm Guide: Cortisol, Posterior Parietal Cortex, Helicobacter Pylori
23 Aug 2016
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Hearing: the stimulus (what is being sensed, sound waves, periodic compression of air (or water). Sound travels through air easier than water: properties of sound waves. Amplitude: the intensity of a sound wave (loudness in decibels), height of the. Frequency: compression per second (pitch of sound in hz). Width of wave= amplitude wave= frequency: receptors, hair cells inside the cochlea, how do sound waves get into the cochlea, outer ear: acts as a directional microphone . Pinna: not essential for hearing, auditory canal is about 2. 5 cm long: middle ear: starts w/ ear drum it"s job is to amplify sound waves because our hair cells are in fluid. Amplifies the pressure of sound waves in order to move the fluid in the cochlea. that contact it. Tympanic membrane (eardrum): vibrates in response to sound waves. Cochlea: pressure from ossicles causes the fluid in the cochlea to move. Basilar membrane: hair cells are embedded in it.
