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two techniques used in speech audiometry
- recorded material
- "live" voice
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recorded materials
inflexible, while no accents, better due to consistant and legal matters
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"live" voice
- microphone
- accents may be problematic
- flexible
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the speech recognition threshold (SRT)
- uses spondees
- sometimes called spondee threshold (ST)
- essentially, this is a "threshold" for speech stimuli
- the SRT should agree with the audiogram
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how do we reduce info on audiogram into one number (for each year) to compare with the SRT
- obtain an average of Pure Tone Threshold for each ear
- two averages (PTA) are used
- the SRT should be wintin 10dB of the PTA
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what are the two averages (PTA) used
- the 3 frequency (average 500, 1000, and 2000 Hz)
- the fletcher (average "best two" of 500, 1000, & 2000 Hz)
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loudness discomfort level LDL
- how much loudness can you take?
- uses continuous discourse
- Dynamic Range = LDL - SRT
- helpful in the fitting of hearing aids
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most comfortable loudness level (MCL)
- at what level would you prefer to listen to sound all day long?
- like the LDL it is obtained with continuous discourse
- useful in fitting hearing aids
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Word Recognition (WR)
- only measure presented at a set level
- aka Speech Discrimination
- tests ability to hear differences in sounds (hat v cat)
- uses Phonetically Balanced word lists of momsyllables (CVC)
- measure sometimes called PB-50
- used diagnostically and sometimes with hearing aids
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AuD normally use only
- 25 words
- rather than write the word down, phonetically they make an X
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PIPB rollover - retrocochlear
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Speech audiometry measures
- SRT speech recognition threshold
- LDL loudness discomfort level
- MCL most comfortable loudness level
- WR word recognition
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