Exam 3 Flashcards
Speech Recognition Threshold
Define
Lowest level that speech can be recognized or identified 50% of the time
Speech Recognition Threshold (SRT)
Purpose
Cross check puretone thresholds to compare SRT & PTA average ( 500 Hz, 1K Hz, 2K Hz)
provides basis for selecting presentation level for speech recognition test.
Speech Recognition Threshold Procedure
ASHA method
- Begin above threshods ( ~20-25 above PTA)
- If correct, DESCEND 5 dB until 2 consecutive words are missed
- Increase 10 dB = starting level
- At Starting Level present 5 words
- Decrease in 5 dB steps & score 5 words each level
- Repeat until all 5 are missed = Stopping Level
- Subtract # from starting level
- add 2 dB correction factor
Speech Dection Threshold (SDT)
Define
Used when SRT can not be established. Lowest level speech can be detected,not understood.
Good for minimal language skills.
Word Recognition Testing
To evaluate speech understanding at suprathreshold levels
measures ability to correctly identify PB words
Rollover of the PI function
Reduction in speech scores at intensities above the level of PBmax
ROLLOVER INDEX
(PBmax - PBmin)/PBmax
Dynamic Range
The range in dB from the SRT and UCL
reduced dynamic range also associated with hyperacusis (hyper sensitivity to moderately loud sounds)
Speech Audiometry
Quantifying the ability to understand everyday communication.
SRT Test stimuli
Spondaic Words
WRS Test Stimuli
Phonetically Balanced monosyllables
WRS Procedure
Present at 40 dB SL
WRS Interpretation
- speech recognition ability
- PI-PB Function
- Rollover
Hearing Loss on WRS
Conductive Hearing Loss
Once presentation level is above conductive component, performance comparable to normal
Hearing Loss on WRS
Cochlear Hearing Loss
Usually not as good as conductive. Depends on degree of configuration
Hearing Loss on WRS
Retrocochlear
Often shows Rollover
Rollover
Poor performance at high presentation levels
MCL
Most Comfortable Loudness
UCL
Uncomfortable Loudness
Dynamic Range
SRT to UCL
Hyperacusis
Hypersensitivity to moderately loud sounds. Reduced DR
Central Auditory Tests
Time Compressed Speech
SPIN (Speech Perception In Noise)
SSI (Synthetic Sentence Identification)
SSW (Staggered Spondaic Words)
Lowest level that speech can be recognized or identified 50% of the time
Speech Recognition Threshold
Define
Cross check puretone thresholds to compare SRT & PTA average ( 500 Hz, 1K Hz, 2K Hz)
provides basis for selecting presentation level for speech recognition test.
Speech Recognition Threshold (SRT)
Purpose
- Begin above threshods ( ~20-25 above PTA)
- If correct, DESCEND 5 dB until 2 consecutive words are missed
- Increase 10 dB = starting level
- At Starting Level present 5 words
- Decrease in 5 dB steps & score 5 words each level
- Repeat until all 5 are missed = Stopping Level
- Subtract # from starting level
- add 2 dB correction factor
Speech Recognition Threshold Procedure
ASHA method
Used when SRT can not be established. Lowest level speech can be detected,not understood.
Good for minimal language skills.
Speech Dection Threshold (SDT)
Define
To evaluate speech understanding at suprathreshold levels
measures ability to correctly identify PB words
Word Recognition Testing
Reduction in speech scores at intensities above the level of PBmax
ROLLOVER INDEX
(PBmax - PBmin)/PBmax
Rollover of the PI function
The range in dB from the SRT and UCL
reduced dynamic range also associated with hyperacusis (hyper sensitivity to moderately loud sounds)
Dynamic Range
Quantifying the ability to understand everyday communication.
Speech Audiometry
Once presentation level is above conductive component, performance comparable to normal
Hearing Loss on WRS
Conductive Hearing Loss
Usually not as good as conductive. Depends on degree of configuration
Hearing Loss on WRS
Cochlear Hearing Loss
Often shows Rollover
Hearing Loss on WRS
Retrocochlear
Poor performance at high presentation levels
Rollover
SRT to UCL
Dynamic Range
Hypersensitivity to moderately loud sounds. Reduced DR
Hyperacusis
Time Compressed Speech
SPIN (Speech Perception In Noise)
SSI (Synthetic Sentence Identification)
SSW (Staggered Spondaic Words)
Central Auditory Tests