Blindness and Audition

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Toronto Metropolitan University *

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Course

102

Subject

Psychology

Date

Oct 30, 2023

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pdf

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1

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Blindness Blindness can result in reorganization of other sensory cortices and changes in other senses Visual agnosia: object recognition deficit ● Due to damage to higher visual cortical areas Blindsight : Visual performance of cortically blind individuals with damage to visual cortex Audition Energy : sound waves Accessory structures: pinna (outer ear) to cochlea (inner ear) Transduction : hair cells (cilia) on basilar membrane (cochlea floor) bend as fluid moves à signal to auditory nerve Coding of waves: ● Amplitude – loundness (decibels) ● Length (frequency) = pitch (hertz) ● Also location on basilar membrane (place theory) ● Purity = timbre (flute to oboe) Hearing (audition) ● The sense we rely on most after sight ● Perception of hearing is based on physical properties of sound waves ○ Pitch: wave frequency (Hz) ○ Loudness: amplitude of sound waves (dB) ○ Timbre: complexity of sound
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