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Audiometry > Test 1 > Flashcards

Test 1 Flashcards

0
Q

What is the human auditory range of frequency

A

20-20,000 hz

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1
Q

Pitch is a psychological aspect directly related to

A

frequency

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2
Q

Loudness is a psychological aspect of sound directly related to

A

intensity

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3
Q

A complex sound has many frequencies. What are the two categories of complex sounds?

A

Aperiodic ex. voiceless speech sounds, projector noise
no fundamental frequency, not harmonically related

Periodic ex. speech sounds
fundamental frequency, harmonically related, repeats itself

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4
Q

What are the two types of measurements for speech audiometry?

A

speech reception threshold

speech discrimination threshold

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5
Q

What is the human auditory range of intensity/pressure level?

A

0-120b

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6
Q

What is the purpose of Tympanometry?

A

to objectively assess the middle ear function

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7
Q

What is a tympanogram?

A

a graphical plot of the eardrum mobility at different air-pressure values

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8
Q

What is the purpose of speech audiometry?

A

to validate puretone audiometry and for accurate differential diagnosis

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10
Q

What is an objective test?

A

No active participation from the patient. Can be done at any age

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11
Q

What are the two measurements in puretone audiometry?

A

air conduction threshold

bone conduction threshold

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12
Q

Frequency specific sounds that have only one frequency of oscillation

A

simple sound

ex. puretones

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12
Q

What is the purpose of puretone audiometry?

A

to determine degree and type of loss

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13
Q

What is a subjective test?

A

patient has to participate

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14
Q

What are the subjective tests used for 0-5yrs population?

A

Behavioral observation audiometry (BOA)

Play audiometry

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15
Q

What are objective tests used for 0-5yrs population?

A 
Otoacoustic Emissions (OAEs) 
Auditory Brainstem response (ABR)
Immittance Audiometry
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16
Q

Procedure for hearing assessment

A

audiometry

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17
Q

What is the purpose of Immittance audiometry?

A

to directly evaluate the middle ear

To indirectly evaluate the inner ear status

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18
Q

What is the purpose of otoacoustic emissions?

A

to evaluate the inner ear-cochlear function

19
Q

Electronic device for hearing assessment

A

Audiometer

20
Q

Graphical plot of AC and BC thresholds across puretone frequencies

21
Q

What is the purpose of Auditory Brainstem response?

A

to evaluate the auditory nerve and brainstem functions

22
Q

What is the hearing threshold level?

A

lowest level you can hear 50% of the time (2/4 or 3/4) OR

lowest level you can hear three repeated times

23
Q

What is the function of the external and middle ear?

A

to collect and conduct sounds to the inner ear

24
What is the function of the inner ear?
sound analysis and discrimination
25
What is PTA 2?
3 frequency average of AC thresholds at 1000, 2000, 4000 Hz useful when have a patient with a selective hearing loss 2000hz + or with normal hearing between 250-1000hz
26
What is the initial intensity dial setting for AC audiometry?
30db | can go as low as 0db or as high as 110db
27
What is the classification of HI for adults? >5
``` 0-25db normal 26-40db mild 41-55db moderate 56-70db moderate-severe 71-90db severe >91db profound ```
28
What is Puretone average 1 (PTA 1)?
3 frequency average of AC thresholds at 500, 1000, and 2000 Hz
30
What is the 2 frequency average/fletcher average?
best of AC thresholds at two frequencies between 500, 1000, 2000hz useful when you have an outlier
31
BC = normal AC = abnormal AC not equal BC air-bone gap > 10
Conductive hearing loss
31
AC = abnormal BC = abnormal AC not = BC air-bone gap >10
mixed hearing loss
32
What frequencies are tested in AC audiometry?
250-8000 Hz with a retest at 1000Hz | order if testing 1, 2, 4, 8, .25, .5, 1kHz
33
What is the purpose of air-conduction audiometry?
to obtain AC thresholds across audiometric frequencies to compute pure tone average (PTA) to compute degree/extent of hearing loss
34
What is the classification of HI based on PTA 0-5yrs?
``` 0-15db htl normal 16-30db htl mild 31-50db htl moderate 51-80db htl severe >81db htl profound ```
37
What could be reasons for variance in audiometric testing?
Equipment - calibration Room - noise level Examiner- attention, motivation, response criteria Subject- attention, motivation, and intelligence
38
What is the purpose of BC audiometry?
to evaluate the inner ear status | for differential diagnosis of site of pathology
39
What frequency levels are tested during BC audiometry?
250-4000hz no retest at 1000hz intensity level = 30db can go as high as 65-70db
40
What is cross hearing of interaural attenuation (IA)?
loss of sound energy as sound travels from the test ear to the nontest ear AC IA= 40db BC IA= 0db (no loss of energy)
41
When do you need to add masking when doing AC audiometry? And how much masking is needed?
AC in test ear - 40db = or > than unmasked BC in nontest ear, mask nontest ear min masking = unmasked AC in nontest ear
42
What are some pitfalls in avoid during hearing screenings?
``` child observing dials examiner giving visual cues incorrect earphone/headband placement unclear instructions test tone too long or too short Let them hear something! if they don't hear at normal db, crank it up ```
43
When is masking needed when doing BC audiometry? And how much masking is needed?
When the air-bone gap in the test ear is >10, mask nontest ear min masking = unmasked AC in nontest + occlusion effect
44
What does a screening for hearing loss look like in a public school?
test at 1000, 2000, 4000 hz | pass fail - fail to respond at any frequency in either ear
45
OE is frequency dependent. Name the db requirements for each frequency
``` 250hz = 30db 500hz = 20db 1000hz = 10db 2000hz = 0db 4000hz = 0db ```
47
AC and BC within 15-25db AC = BC air-bone gap <10
normal hearing
48
AC = abnormal BC = abnormal AC = BC air-bone gap = or <10
sensorineural hearing loss
53
What is the occlusion effect?
an increase in perceived loudness of BC sounds in the occluded ear (nontest ear) with normal hearing and sensorineural loss

Audiometry (2 decks)

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