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The human ear is a
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Terms in this set (26)
The human ear is a
fourier analysis device: take sounds and breaks them down into simpler sounds
timbre
sound quality related to the harmonic structure of sound
Auditory seeing analysis
When we hear several different sounds at once, bird singing, dog barking, car driving by - > they all come in as one sound but the ear breaks it down into separate sound: location is important but you can group the frequencies together
Of all the senses there are only two that answer the question where the stimulus is?
audition and vision ; The only two senses that we perceive the stimuli outside the body
Midbrain is important for
generating a map of space around us and being able to pinpoint where the stimulus is
All sensory systems are composed of
flat sheets of cells there is no way to encode 3rd dimension in space
Beacause of the limitation of 2d sheets the brain has to
make up the depth (uses the two ears: two receptor sheets) that sit at two different locations in space
The brain uses differences in what do decide where the stimulus is located ?
experiences
The delay in interaural time differences is good for....
giving the brain a cue to find out where the sound is located
If sound hits the ears the same time what is the interaural time difference?
zero
2 major cues that the brain uses to figure out where sound is located in the environmentintraural time difference and interaural level differenceUltimately the midbrain will be the place wherethe map of space around us is used to pinpoint the locationWhat does the pinna do?the fleshy part of the outer ear; helps us to determine if sounds are behind or in front of usSince the pinna faces forward...the perception of sounds may be changed if they are in front of us rathe than behind usIntensity differnces can be caused bythe pinna itselfAuditory distance perceptionexactly how far away it is perceivedInverse square lawas the distance from a source increases (something is farther and farther away from you) the intensity of the sound decreases; but decreases faster than the spaceIn the inverse square law what happens to the intensity?dropping off quicklyIn the inverse square law the decrease in intensitity is what?the distance squaredThe limits of visual sphere are much larger than-the auditory world that surrounds usIf you take away the fundamental frequency how can you hear pitch correctly ?the brain can figure it out because the frequency difference between the harmonics IS the fundamentalEven if you remove fundamental there is stilla powerful cue as to what the correct pitch is you hear that remains in the soundHow is it that we can pull out different sounds when they are hitting the ear together at once?auditory seeing analysis we can group them together on the basis of timbre (the dog will always have this timbre, bird etc.)Grouping by onset/offsetsounds that start at the same time probably came from the same sourceContiuity and restoration effectsit turns out the brain can still complete the sound even if it is interuptedsynthesisthe reasembaling of sensory organization