Recruitment And Adaption Testing

Question 1

What is loudness recruitment

Answer 1

It is the subjective sensation of loudness that builds up at a more rapid rate than normal as sound intensity increases.

Question 2

What is Fowlers alternate binaural balance test?

Answer 2

• ABLB
• limited to unilateral impairment
• tone introduced to good ear then bad ear
• tone increase and decreased until patient reports it is equally loud in both ears
• continue in 20dB intervals

Question 3

What is short increment sensitivity tests?

Answer 3

• SISI
• small changes in intensity are not usually detected near threshold
• several dBs are needed before loudness increases unless suffering cochlea damage
• every 5 secs tone rises by 1dB for 1/5 second
• 20 tones presented and count number recognised and times 5 for percentage
• if 0-30% = normal ME or retrocochlea
• if 60-100% = cochlea disorder

Question 4

What is tone decay?

Answer 4

It could indicate a retro cochlea problem
- tone decay is normal with all heating to an extent as any signal help for a while will start to fade
- rapid decay may signify a retro cochlea disorder

Question 5

What is caarhaarts tone decay test?

Answer 5

• present tone at patients threshold and time how long signal is audible
• if audible for 60 secs then no tone decay
• if tone fades, stop clock, increase intensity and continue process till patient hears tone for full 60 seconds
• difference between original threshold and new threshold is used to express degree of decay in dab
• minimum of two frequencies at 1k and 4K

Question 6

What is Bekesy audiometry

Answer 6

• patients records own thresholds
• two tones tested - continuous and interrupted
• interpretation involves comparison of 2 tracing results.
  Results =
  1. Both tracings the same = conductive or normal hearing
  2. Continuous tone diff to hear in high frequencies = cochlea disorder
  3. Can’t maintain continuous tone = retro cochlea

Question 7

What is evoked response audiometry?

Answer 7

-There is electrical response (too invasive)
- auditory brain stem response (non invasive)
- cortical response audiometry (detects stimulus up to brain)