Speech Audiometry Flashcards
Speech Awareness Threshold: What is the goal? What is the stimulus? Who is it used for? Is there a carrier phrase?
Goal: To find the level at which the patient can detect 50% of the words presented
Stimulus: Spondees
Who: kids, adults with poor word recognition, malingerers
No carrier phrase
Speech Reception Threshold: What is the goal? What is the stimulus? What is the PI function? Is there a carrier phrase? Open set list or closed set list?
Goal: To find the level in dB HL at which the patient can repeat 50% of the words presented
Stimulus: Spondees
Performance improves dramatically as intensity increases
No carrier phrase
Closed set list
Martin & Dowdy: Is this ascending or descending? Why? What is the starting level? What if they don't respond? What if they still don't respond? Explain the bracketing effect after the a correct response it obtained
Descending because it starts above expected threshold
Starting level is 30dBHL
No response, raise to 50dBHL
Still no response, raise in 10dB increments
After a correct response - bracketing effect:
Correct? Lower 10 dB
Incorrect? Raise 10dB
Chaiklin-Font-Dixon:
Is this ascending or descending? Why?
What is the starting level?
Present one spondee at the starting level and then what?
Once word is repeated correctly, then what?
Ascending because it starts below expected threshold
Starting level is -10dB
Present one spondee at -10dB
Raise in 10dB increments until correct response obtained
Then, drop 20dB and begin presenting spondees until 3/6 correct
If 3/6 not obtained raise 5dB increments until the patient repeats 3/6 words correctly
Word recognition testing: How is it scored? What is the goal? What is the stimulus? What level do we test? Is there a carrier phrase? Open set or closed set list?
Score: Percentage correct at a given level
Goal: to find the patient’s maximum performance on the PI function (pb max)
Stimulus: monosyllabic, phonetically balanced words
Level: 40dbHL above the SRT (40dbSL)
Yes there is a carrier phrase
Open set list
Who can achieve a word recognition score of 100%?
Normal hearers and people with conductive HLs
What is a neural loss PI function called? Why is this?
Rollover function
What is the most comfortable level for typical listeners?
40 - 55 dBSL
What is the loudness discomfort level for normal listeners?
100 - 110 dBSL
SRT should be _ dB within PTA
10dB
What are the formulas for masking for speech audiometry?
SRT TE - IA >= best BC NTE
Presentation Level TE - IA >= best BC NTE
How much masking is needed for speech audiometry?
20-30 dB less than what is going in the test ear
