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Airborne vs. bone conduction

Airborne vs. bone conduction. Conduction hearing loss. Sensorineural hearing loss. The three parts of the ear. Sound frequency ≈ pitch. Sound amplitude ≈ loudness. Phase. Middle ear ossicles. Amplification due to surface area. ~16 times. Amplification due to lever action.

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Airborne vs. bone conduction

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  1. Airborne vs. bone conduction

  2. Conduction hearing loss

  3. Sensorineural hearing loss

  4. The three parts of the ear

  5. Sound frequency ≈ pitch

  6. Sound amplitude ≈ loudness

  7. Phase

  8. Middle ear ossicles

  9. Amplification due to surface area ~16 times

  10. Amplification due to lever action Total amplification =(sa reduction)*(lever) Total amplification =16*1.3 times

  11. Middle ear muscles reduce pressure tensor tympani: lower amplitude, higher f stapedius: lower amplitude

  12. The simplified (unrolled) cochlea

  13. Cochlear tonotopy

  14. Pressure waves and the cochlear duct

  15. Organ of Corti

  16. Outer and inner hair cells

  17. Outer hair cells move

  18. OHCs are the cochlear amplifier

  19. Hair cell and afferent neuron responses to sound

  20. Hearing depends on extensive central processing

  21. Speech production

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