The Ear and Hearing

1
The Ear and Hearing

• Ms. Cotter

2
Ear Anatomy

• 3 Parts of the Ear
• Outer Ear
• Middle Ear
• Inner Ear

3
Outer Ear

• Ear Lobe Pinna
• Ear Canal
• Ear Drum Tympanic Membrane

4
Middle Ear

• Contains the bones
• Smallest bones in the body
• Malleus
• Incus
• Footplate of stapes in open window - Stirrup
• Contains Eustachian tube
• Equalizes pressure in the ear
• When swimming or flying you can feel the pressure
  equalize.

5
Inner Ear

• Semicircular Canals labyrinth
• Cochlea
• Hearing system
• Small hairs on the surface that turn the
  vibration into chemical reaction for the brain.
• Auditory Nerve - VIII

6
Type of Hearing Loss

• Conductive
• Sensorineural
• Mixed some of both
• http//homepages.dsu.edu/paulicr/glossary/definiti
  ons/audiogram.htm
• Audiogram illustrations

7
The Ear
8
Conductive Hearing Loss

• Outer and Middle Ear
• Obstruction in canal
• Ear Wax
• Tumor
• Malformation
• Damage to the ear drum
• Fluid in ear

9
Sensorineural Hearing Loss

• Inner Ear
• Cochlear
• VIII Nerve
• Permanent Hearing Loss
• http//www.musicandhearing.org/00000194c40c43e14/0
  0000194d2096870d/index.html
• Sample sounds
• http//www.phonak.com/consumer/hearing/hearingloss
  demo.htm
• Sample sounds

10
Sensorineural Continued

• Types of hearing loss
• Genetics
• Meningitis
• Anoxia lack of oxygen
• Heard trauma
• Neurofibromatosis tumors
• Exposure to noise
• Aging
• Measles, mumps, rubella

11
Mixed Hearing Loss

• Combination of both conductive and sensorineural
  hearing loss.

12
Hearing Loss Cites

• http//www.sesa.org/CEEHI/hearingloss/typeloss.htm
  l
• hearing loss cite