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10 Cards in this Set

  • Front
  • Back
Parts of the Outer ear
Pinna, Tragus, Concha, External auditory meatus
Parts of the Middle ear
tympanic membrane, middle ear ossicles, stapedius and tensor tymapni muscles, eustachian tube
What does the pinna do?
Localize sounds in the verticle plane
What does the eustachian tube do?
Equalizes pressure between the middle ear and nasopharynx
What is a threshold
a stimulus that is just enough for there to be an effect
Absolute threshold?
lowest intensity where the person can detect a signal of sounds
Degee of hearing loss
Min 10-25 dB
Mild 25-40 dB
Moderate 40-55 dB
Moderately severe 55-70 dB
Severe 70-90 dB
Profound more than 90 dB
Type A
sharp peak in the curve
Normal
Type B
flat or slightly rounded
Due to mass added to the middle ear from fluid
Type C
Negative pressure dur to poor functioning auditory tube
Peak will occur in the negative pressure region