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1043 AUDIO > Behavioral Ax > Flashcards

Behavioral Ax Flashcards

1
Q

Two ways we can quantify the sound in Behavioral
Assessment,

A
  1. Volunteer the sound
  2. Objective audiometry
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2
Q

Gold standard is the

A

Behavioral ax

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3
Q

Why do we want to do PTA?

A
  1. Estimate degree of handicap
  2. Get baseline measure of hearing
  3. Monitor changes in hearing
  4. For screening hearing loss
  5. For determining candidacy for a hearing aid or a cochlear implant
  6. For selecting the frequency-gain characteristics of a hearing aid.
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4
Q

Human hearing range

A

20-20,000 Hz

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5
Q

Hearing is sensitive to speech sounds @

A

250-8000Hz

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6
Q

lowest, faintest, softest intensity that the person can hear/detect /discern

A

Thresholds

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7
Q

air conduction, degree of your hearing, if may normal, mild, moderate, profound; only test by AC

A

SCREENING

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8
Q

gagamit ng iba’t ibang transducer and we’re able to assess the outer, middle, and inner ear, asl well as the neural components gagamit ng iba’t ibang transducer and we’re able to assess the outer, middle, and inner ear, asl well as the neural components

A

DIAGNOSTIC

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9
Q

○ Simple signal
○ Standard frequency, phase, amplitude, and duration

A

PURE TONE

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10
Q

○ vary in frequency over a range that is within a few percent of the nominal frequency

A

Warble tone

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11
Q

Noticeable to the ear as a noise of distinguishable pitch, and which represents a dominant feature of the total source noise

A

Narrow band

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12
Q

Transducers

A
  1. Supra aural
  2. Circumaural
  3. Inserts
  4. Speakers
  5. Bone vibrators
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13
Q

○ Widely available
○ Ease of calibration

A

Surpra-aural

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14
Q

Better seal

A

Circumaural

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15
Q

○ Better interaural attenuation
○ Better test-retest at 6-8KHz
○ Better for collapsing canal

A

inserts

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16
Q

XXX for perforated ear

A

Inserts

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17
Q

Free field→ azimuth
Not ear specific

A

Speakers

18
Q

○ Placed behind the mastoid process - Pwede ilagay sa forehead
○ Has a lower sound output limit as compared with AC transducers (60-70 dB)

A

Bone Vibrator

19
Q

● Higher maximum output For patients with ear infection
● Lower interaural attenuation May feel heavy for the patient
● Higher interaural attenuation

A

AC audiometry

20
Q

● For collapsing ear canals
● For patients with small head
● Lower interaural attenuation
● May feel heavy for the patient
● More expensive because of foam tip replacements
● Not reliable with eardrum perforations

A

AC audiometry

21
Q

● Bypasses the outer ear and the middle ear
● Directly stimulates the inner ear (cochlea)
● Used to measure the function of the cochlea or the
“sensory” function

A

Bone Conduction Audiometry

22
Q

● Better for the concentration of the tester
● Less cues available for the patient

A

Two room set-up

23
Q

Better for patients that need constant feedback or reassurance
For patients that need constant supervision during testing

A

One room set up

24
Q

Start at intensity that patient will most recognize well

A

Familiarization method

25
Q

More likely that patient has residual
hearing at 1000Hz compared to other frequencies

A

Start with 0 hz

26
Q

○ For familiarization
○ If the patient says hearing is equal on both ears, start with the right ear

A

Test better ear

27
Q

○ Duration: 1-2 seconds
○ Warble tone: for patients with tinnitus, and for children
○ Narrowband: Ideal for HA and CI aided testing

A

Stimulus tone

28
Q

Get inter-octave thresholds if there is a difference of

A

20dB or between octaves

29
Q

Frequency hierarchy in PTA

A

1000Hz →2000Hz →4000Hz →8000Hz →500Hz →250Hz →Recheck 1KHz

30
Q

Present tone at 40dB! If there is a Response:

A

decrease level by 10dB

31
Q

Present tone at 40dB, if no response:

A

increase level by 20dB. If 90dB, increase by 10dB.

32
Q

Determining threshold

A

level at which responses were obtained at two ascending runs (50%)

33
Q

Both AC and BC are 25 dB or better across all freq

A

Normal

34
Q

Only BC is within normal range across all freq

A

Conductive

35
Q

Both AC and BC are abnormal but gap is <10
dB

A

Sensorineural

36
Q

Both AC and BC are abnormal and gap is >15 dB

A

Mixed

37
Q

25 dB or better

A

Normal

38
Q

26dB - 40 dB

A

Mild

39
Q

41 dB - 60 dB

A

Moderate

40
Q

61 dB - 80 dB

A

Severe

41
Q

81 dB or greater

A

Profound

1043 AUDIO (3 decks)

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