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9510 Term 2 > Week 1 > Flashcards

Week 1 Flashcards

1
Q

Suprathreshold detection abilities vary in terms of

A
  • sound clarity and speech recognition
  • acoustic signal encoding associated with: frequency resolution and discrim.
    Temporal processing
    Loudness perception
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2
Q

Who used tonal stimuli for the contour test

A

Cox 1997

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3
Q

What is the contour test

A

Scale of loudness 1. Very soft, soft, comfortable but slightly soft, comfortable, comfortable but slightly loud, loud but ok, uncomfortably loud

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4
Q

What does damage in the auditory periphery cause?

A

Outer hairstyle loss leads to more linear Basler membrane displacement, and we lose the frequency specificity

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5
Q

Low intensity, what type of range exist for the basilar membrane displacement

A

Narrow range

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6
Q

Increase in intensity means we see a watt of basilar membrane displacement

A

Broader range

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7
Q

With functioning out her hairstyles, what do we expect to see?

A

Gain occurring at specific locations on the BM (frequency specificity)

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8
Q

A passive response is associated with bm what

A

A loss of specificity and gain associated with active hair cells

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9
Q

How does the dynamic range of the BM change for normal hearing versus damaged hair cells

A

Normal has a wider dynamic range

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10
Q

With what type of hearing loss is abnormal loudness perception associated with recruitment occur

A

Sensory neural hearing loss
Related to a cochlear loss without hair cell damage

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11
Q

LDL

A

Loudness discomfort level
Level at which sounds become uncomfortably loud,
reflect tolerance to loud sound

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12
Q

Abnormal loudness perception without HL is associated with

A

Hyperacusis

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13
Q

Hyperacusis

A

Sensitive to sound at any level but normal or near normal threshold
May co occur with tinnitus
Unknown cause

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14
Q

What is hidden hearing loss?

A

Issues with speech and noise, hyperacusis, or other tinnitus
Individual has auditory damage without having significant hearing loss identified

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15
Q

Why is it important to measure LDL?

A

Used to assess hyperacusis
Gives a glimpse into the patient’s experience
Good to know for amplification, because the patient may reject the hearing aid if the MPO is beyond the limits
Significantly lower than expected it can remove the dynamic range

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16
Q

LDL Hawkins procedure

A

Ascending method in 2 DB steps
Lowest intensity -1db where uncomfortably loud on 2/3 trials
Use warble tone and insert

17
Q

LDL Hawkins scale

A
  1. Very soft
  2. comfortable but slightly soft
  3. Comfortable
  4. Comfortable but slightly loud
  5. Loud but ok
    6 uncomfortably loud
  6. Extremely uncomfortable
  7. Painfully loud
18
Q

A study compared Hawkins with beskey procedure what did they find

A

Hawkins had small fluctuations 3-4db

19
Q

Mcl

A

Most comfortable level
Level or range designed by an individual as most comfortable for listening
Does not have a standardized accepted clinical method

20
Q

How much can MCL change if you’re listening for intelligibility versus comfort

A

It is five DB higher for an intelligibility on average

21
Q

What is the potential issue with fitting to MCL

A

MC I was typically five DB lower than what we would expect for good intelligibility so if the hearing aid is fit to MCL, it may not be Max audibility

22
Q

Martin and Clark procedure

A

Find MCL by starting at a speech signal slightly above the SRT use an ascending approach, increasing intensity in five DB

23
Q

Punch procedure

A

Conduct LDL, ascending MCL, and then descending MCL
If you test MCL or LDL first, it can elevate the MCL, because preceding sound serve as a reference for loudness judgements

24
Q

what is a PIPB function

A

graph of the WRS vs the presentation level in dB
- at someones threshold they will get 0% correct

25
Q

how does PIPB differ in CHL to normal

A

need larger initial input but then similar

26
Q

how does PIPB differ in SNHL to normal

A
  • depends on slope of HL and configration, variable degree of recruitment
  • PBmax wont be best MCL for those with SNHL
27
Q

if people have the same audiograms do they have the same sNHL

A

no they could have different underlying pathophysiology and different experieneces

9510 Term 2 (4 decks)

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