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Audiometry > Pure Tone Audiometry > Flashcards

Pure Tone Audiometry Flashcards

1
Q

T/F Pure tone audiometry is the most common behavioral procedure to test for degree and etiology of a hearing loss

A

T

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2
Q

What is the audiological definition of threshold?

A

The SOFTEST level of sound a person can detect 50% of the time

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3
Q

T/F The human ear is sensitive to all

frequencies equally

A

F

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4
Q

What is our range of auditory sensitivity? Why is this?

A

3,000-3,500 Hz

Result of ear canal resonance

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5
Q

Why are we also sensitive at 1,500 HZ?

A

Result of middle ear resonance

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6
Q

Dynamic range across frequencies is called:

A

Audibility area

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7
Q

What is dynamic range?

A

It is the range between our upper limits of tolerance and threshold of audibility

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8
Q

What does it mean to say that LDL is a flat function?

A

For the average person, their LDL is the same for every frequency – 130dB

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9
Q

Do audiograms use dBHL or dBSPL?

A

dBHL!!!!

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10
Q

What is the purpose of using an audiogram?

A

It gives us a flat line to compare normal hearing

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11
Q

What are the options of transducers?

A

Headphones, inserts/earphones, bone conduction oscillator, and loudspeaker

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12
Q

Compare and contrast full range audiometer with limited range audiometer and screening audiometer in terms of signals, transducers, and masking abilities

A 
Full:
Signals - pure tones, speech stimuli
Transducers - all transducers
Masking abilities - all masking abilities
Limited:
Signals - pure tones
Transducers - headphones and bone oscillator
Masking abilities - white noise masking
Screening:
Signals - pure tones
Transducers - earphones 
Masking abilities - none
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13
Q

If you don’t get a response at 30dBHL for familiarization, what dB should you go to?

A

50dBHL (if still no response, then 10 dB increments up from there until a response in obtained)

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14
Q

What is familiarization?

A

Familiarization is a test run to make sure the clients know what they’re doing before you start collecting information

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15
Q

What are the sites of lesion for a conductive hearing loss?

A

Outer and middle ear

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16
Q

During threshold determination what happens when you get a response? No response?

A

Response? Decrease 10dB

No response? Increase 5dB

17
Q

When a difference of 20 dB or more exists between the threshold values at any two adjacent octave frequencies what do you do?

A

Measure inter-octaves

18
Q

T/F When you place the bone conduction oscillator on the right mastoid, only the right cochlea is stimulated

A

F! Bone conduction stimulates both cochleas unless you use masking

19
Q

What are the 5 items that you look for when interpreting an audiogram?

A 
Which ear
Symmetry between ears
Slope of loss
Nature of the loss
Degree of loss
20
Q

Pure Tone Average is the average of what three frequencies?

A

500, 1000, 2000Hz

21
Q

What are the sites of lesion for sensorineural hearing loss?

A

Cochlea
Auditory Nerve
Central Auditory Pathways

22
Q

What are the steps of conducting on audiometric evaluation?

A

Obtain AC results
Obtain BC results
Compare thresholds
Determine type of hearing loss and site of lesion

23
Q

If AC and BC results are the same what type of hearing loss is this and what is the site of lesion?

A

Sensorineural hearing loss

Inner ear

24
Q

If AC results show a hearing loss but BC results show normal hearing, what is the hearing loss and site of lesion?

A

Conductive hearing loss

Outer or middle ear

25
Q

What is the definition of the symmetry of hearing loss

A

A difference in the two ears with respect to degree and slope

26
Q

What is a considered a significant air-bone gap? What is not considered significant?

A

15dB IS significant

10dB is NOT significant

27
Q

With a mixed hearing loss, air conduction results will always have a higher degree of hearing loss. Why is this?

A

The sound has to travel through the sensorineural impairment AS WELL AS the conductive impairment, making it a double whammy for that sound wave!

28
Q

List the range in Hz for each degree of hearing loss:

A 
0-25 Normal
26-40 Mild
41-55 Moderate
56-70 Moderately-Severe
71-90 Severe
91+ Profound
29
Q

When do you use a two-frequency pure tone average?

A

When there is a significant difference in threshold (20 dB or greater) between two frequencies, then you can calculate a two-frequency PTA

30
Q

What are the 9 slopes of hearing loss?

A 
Flat loss
Gradual slope
Rising slope
Sharply sloping
Precipitously sloping
Fragmentary slope
Notch slope
Trough slope
Cookie bite slope
31
Q

What is the definition of precipitously sloping?

A

Near normal in the low frequencies, sudden drop at higher frequency

32
Q

What slope is created by only having responses in the left corner of an audiogram?

A

Fragmentary slope

33
Q

What is the definition of a trough shaped slope?

A

Better hearing in the mid-frequencies

34
Q

What is the definition of a cookie bite slope?

A

Poorer hearing in the mid-frequencies

Audiometry (11 decks)

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