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Understanding Acoustic Reality: The Intricate Mechanisms of Hearing from Ear to Brain

Delve into the fascinating world of acoustics as the 20-fold reinforcement from malleus, incus, to cochlea's intricate structures is explored. Gain insights into the functioning of the auditory nerve, hair cells, and the Corti organ, uncovering the mysteries of how sound is perceived and processed by the brain.

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Understanding Acoustic Reality: The Intricate Mechanisms of Hearing from Ear to Brain

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  1. II Acoustic Reality II.2 (F Sept 13) Hearing with Ear and Brain

  2. 20-fold reinforcement malleus incus enters the upper (oval) window of cochlea stapes semicircular channels cochlea 2.5 windings30 mm length ear drum auricle 1 cm2

  3. oval window tectorial membrane scala vestibuli scala media scala tympani 1 mm auditory nerve inner hair cells outer hair cells basilar membrane endolymph liquid perilymph liquid 10-8 cm in 1/200 sec Corti organ Reissner‘s membrane 24‘000 hair cells 30-50 stereo- and 1 kino-ciliae

  4. George von Békésy 1961, Harvard U, Nobel prize stapes helicotrema round window high frequencies low frequencies

  5. colliculus inferior nucleus cochlearis gyri Heschl corpus geniculatum mediale nuclei superiores olivae nervus cochlearis 30‘000 nerve „cables“ 4 major transformations of data!

  6. cat brain low pitch cochlea high pitch multiple representation of same pitch

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