chance-04.29 - NEUROBIOLOGY & BEHAVIOR BIO SCI N110...

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NEUROBIOLOGY & BEHAVIOR BIO SCI N110 Spring Quarter 2009 April 29, 2009
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Audition: 1.What is sound? Pressure Waves 1.Structure and function of the outer ear 1.Structure and function of the middle ear 1.Structure and function of the inner ear/cochlea regions of the basilar membrane resonate at particular frequencies mechanoelectrical transduction by inner hair cells 1.Auditory problems
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What is sound? Amplitude = Loudness Frequency Waveform = Complexity
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Features of sound: amplitude = intensity or loudness frequency = pitch waveform ≈ complexity very few sounds are a single frequency phase = timing difference sound is pressure waves generated by vibrating air molecules audible variations in air pressure
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Basic structure of the ear:
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Tympanic membrane outer ear: function is to collect sound energy and focus it on the tympanic membrane (ear drum) pinna and concha - funnel shaped to help collect sound some animals (horses, cats, dogs) can move the pinna of their ears to better focus on sounds
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chance-04.29 - NEUROBIOLOGY & BEHAVIOR BIO SCI N110...

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