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  1. outer ear contains
    • pinna &
    • ear canal &
    • ear drum
  2. pinna
    visible part of ear
  3. earcanal
  4. sound waves travel through this
  5. ear drum
    tympanic membrane
  6. middle ear has
    • ossicles
    • hammer
    • anvil
    • stirrup
  7. inner ear has
    • cochlea which is where transduction occurs
    • & semi-circular canals
  8. where is sound made into neural impulses
  9. semi circular canals contain
    vestibular system
  10. to hear we must
    detect changes of air pressure in eardrum
  11. what creates sound waves
    alternating regions of high and low pressure in the air
  12. frequency
  13. pitch
    • related to frequency
    • pitch is what our brain percieves
  14. amplitude
    height, intensity, & amount of energy in wave
  15. waveform
    determines timbre of sound we percive
  16. how are sounds transmitted
    eardrum vibratons passed through middle ear bones then to cochlea
  17. basilar membrane
    sepertes chambers
  18. hair cells
    converts sound waves into neural impulses
  19. after vibrations hit thew cochlea then
    oval window moves in & out causeing pressure in outer chamber to change quickly
  20. after the oval window it causes
    ripples in the basilar membrane
  21. after bailar membrane
    the hair cells bend causing neural impulses
  22. neural impulses are picked up by the
    auditory nerve
  23. after the auditory nerve impulses ar etaken to
  24. after thalamus then the
    auditory cortex
  25. place theory
    we sense pitch bc hair cells move in different places in the cochlea
  26. frequency theory
    we snense pitch becaus ehair ce;s fore at different rates in the cochlea
  27. conduction deafness
    problem with system of condution the sound
  28. nerve deafness
    hair celld in cochlea are damaged usually by loud noise
Card Set:
2015-11-30 21:18:24
test 4
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