PSY 2301 Chapter Notes - Chapter 10: Medial Geniculate Nucleus, Cochlear Nucleus, Cochlear Implant
14 Sep 2016
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Brain and behavior chapter 10 auditory system sound waves are the stimulus for audition. They are undulating displacement of molecules caused by waves of pressure change in air molecules. Sound waves are graphed by plotting air molecule density changes against time. frequency- number of cycles a wave completes in a given amount of time (in hz) amplitude- intensity of a stimulus (in db) Complexity- sounds with single frequency are pure tones most sounds mix wave frequencies together to create complex tones. Humans perceive sounds between 20 and 20000 hz frequency)hertz= 1 cycle per second. Amplitude- loudness more energy- moves farther left up and down at same frequency therefore perceived as louder mp3 players and hearing loss: Hearing loss in teens has increased by 30% between 1998 and 2006. Just 15 min of listening to an ipod with earbuds at 100 db can be harmful to hearing! Complexity- corresponds to our perception of timbre or uniqueness.
