PSYCH 1XX3 Lecture Notes - Lecture 1: Baby Talk, Auditory Scene Analysis, Music Perception
8 Mar 2016
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Document Summary
Can vary based on living environment (i. e. water vs. land) Vibrations through a medium, much slower than light. Eardrum responds to changes in air pressure: compressed air pushes drum inwards, less dense air pulls out. Timbre: a measure of complexity, combination of pure tones and overtones. Oval window from middle ear vibrates the fluid inside, and the round window moves in compensation and accordance with the fluid changes. Contains neural tissue needed to translate f. pressure into signal. All along the cochlea are hair cells, their movement corresponds with that of the fluid, and this movement becomes the neural signal. Flexible membrane that runs the length of the cochlea. Movement of the fluid cause the basilar vibrations. Basilar gets wider towards the end, and different frequencies vibrate different parts. When a hair cell is bent, it releases neurotransmitters. Bipolar cell axons make up cochlear nerve, a branch of the auditory nerve.
