lec 12 Flashcards
0 dB HL= ___dB SPL @ 1000 Hz
20
Speech from a close distance in quiet: ____ dB HL or ____ dB SPL
- 40-45
- 60-65
what is the purpose of Speech Recognition Threshold (SRT) vs Word Recognition Score (WRS) ?
- SRT: acuity
- WRS: clarity
what are the stimuli of SRT vs WRS?
- SRT: spondees (2 syllables, equal emphasis)
- WRS: monosyllabic words
what is the testing level of SRT vs WRS?
- SRT: threshold
- WRS: suprathreshold
what does SRT evaluate the accuracy of?
- pure tone average
- should be within 10dB of PTA at 500, 1000, 2000Hz
T or F: for SRT we familiarize the person with the stimuli before the test
true!
what is the SRT technique? (3)
- familiarize with 8 spondees
- 10 down 5 up
- SRT = lowest intensity with 2 positive responses (do not have to be upon ascent)
what is a false positive vs false negative for SRT?
- false positive: patient responds when there is no stimulus (highly unusual for speech stimuli).
- false negative: patient does not respond when the stimulus was heard.
when do we mask for SRT?
when: SRTte - IA ≥ any* BCnte
what kind of stimuli does WRS use? what % difference between ears is significant?
- phonetically balanced (PB) words
- 8% (for 50 words)
what % difference between ears is significant for WRS for 25-word lists?
12%
what % difference between ears is significant for WRS for 10-word lists?
- 100%
- if anything less, need to redo with 25 or 50-word list
how do you test WRS? (3)
- find a comfortably audible intensity level (40 or 45 dB HL for typical hearing).
- present a list of 50 words.
- get a percentage score for each ear.
why are steeply slopping losses difficult for WRS?
difficult to determine a presentation level
