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Unformatted text preview: REVIEW 1 9/21/11 Major Points:-Fundamental problem of making sense of our acoustic surroundings Frequency analysis is key to making sense of our acoustic surroundings Each mode of vibration (fingerprint for sound source) corresponds to a particular frequency of oscillation which corresponds to a particular pitch-Reflection : sound has a small wavelength in respect to the object-Defraction : sound has a large wavelength in respect to the object-Interference: sum of two or more sounds-Fundamental parameter of sound that determines what will happen to the sound when it encounters an object : the size of the wavelength-Transduction: the conversion of a sound into an electrical signal sound enters ear canal and sets eardrum (tympanic membrane) into motion ossicular chain set into motion opens oval window fluids in cochlea are activated which then sets the basilar membrane into motion (high frequency: basal end of membrane vibrates most. Low frequency: other end of membrane vibrates most) hair cells on basilar membrane are activated which then send electrical signals to the brain...
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- Fall '08
- basilar membrane, hair cells, afferent nerve, auditory neuropathy