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