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Questions and Answers
What can cause conduction hearing loss?
What can cause conduction hearing loss?
- Damage to neural pathways
- Destruction of hair cells
- A plug of wax (correct)
- Brain damage
Which type of hearing loss is due to brain damage?
Which type of hearing loss is due to brain damage?
- Mixed hearing loss
- Central hearing loss (correct)
- Nerve hearing loss
- Conduction hearing loss
What is the frequency range of an audiometer?
What is the frequency range of an audiometer?
- 250 to 8000 Hz (correct)
- 100 to 10,000 Hz
- 300 to 9000 Hz
- 200 to 7000 Hz
Which condition does NOT lead to nerve hearing loss?
Which condition does NOT lead to nerve hearing loss?
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What is the range of decibels considered as severe hearing loss?
What is the range of decibels considered as severe hearing loss?
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Which of the following can cause conductive hearing loss?
Which of the following can cause conductive hearing loss?
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A patient with a hearing loss of 45 dB would be classified as having what degree of hearing loss?
A patient with a hearing loss of 45 dB would be classified as having what degree of hearing loss?
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What does an audiometer measure?
What does an audiometer measure?
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Study Notes
Hearing Loss (Deafness)
- Caused by changes at any level of the auditory system
Types of Hearing Loss
- Conduction hearing loss: impairment in sound transmission through the external or middle ear to the cochlea
- Nerve hearing loss: damage to hair cells in the cochlea or damage to the auditory nerve
- Central hearing loss: brain damage
Conduction Hearing Loss
- Affects the passage of sound between the ear drum and the inner ear
- Caused by:
- A plug of wax blocking the ear canal
- A hole in the eardrum
- Fluid in the middle ear
Nerve Hearing Loss
- Defined as damage to the hair cells in the cochlea or damage to the neural pathways of hearing (nerves)
Hearing Test (Audiometer)
- Uses an electronic instrument called an Audiometer
- Has a dial with a range of 0 to 120 dB (decibels) and a frequency range of 250 to 8000 Hz (Hertz)
- Tests patient's hearing for different frequencies and volumes to determine the degree of hearing loss
Degrees of Hearing Loss
- Normal Hearing: 0-25 dB
- Mild Hearing Loss: 26-40 dB
- Moderate Hearing Loss: 41-55 dB
- Moderately Severe Hearing Loss: 56-70 dB
- Severe Hearing Loss: 71-90 dB
- Profound Hearing Loss: 91+ dB
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