PSYCH 1 Lecture Notes - Lecture 26: Sound Localization, Stirrup, Cholera
Document Summary
Greater bending of hair cells: more neurotransmitter substance is released, certain cells only respond to very loud sounds. Sound is actually pressure in waves, air or other conducting material. Frequency: the number of sound waves or cycles per second (hz) Amplitute: vertical size of the sound waves. Amount of compression and expansion of the molecules (db) Transduction system of the ear is made up of bones, membranes and liquid-filled tubes designed to translate pressure waves into nerve impulses. Sound waves travel into auditory canal learding to the eardrum (which vibrates to due to the sound) Stirrup (stapes) amplifies sound up to 30x. Basil membrane: a sheet of tissue which holds. Organ of corti: holds little hair cells that are sound. When sound is heard, the waves hit the eardrum, which then causes pressure in thee oval window by the hammer, anvil and stirrup of the middle ear sets the fluid inside the cochlea into motion.
