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speech audiometry

speech audiometry. dynamics of speech the diagnostic audiometer test environment patient’s and clinician’s role speech-threshold testing most comfortable loudness and uncomfortable loudness speech-recognition testing audibility index. dynamics of speech. intensity frequency

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speech audiometry

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  1. speech audiometry • dynamics of speech • the diagnostic audiometer • test environment • patient’s and clinician’s role • speech-threshold testing • most comfortable loudness and uncomfortable loudness • speech-recognition testing • audibility index

  2. dynamics of speech • intensity • frequency • suprasegmentals

  3. dynamics of speech • intensity • whisper - 20 dB HL • normal conversational speech - 50 to 60 dB • loud speech - 70 dB • shouting - 90 dB

  4. dynamics of speech • frequency • about 250 to 8000 Hz • most important speech sounds - 500 through 6000 Hz

  5. dynamics of speech

  6. dynamics of speech

  7. dynamics of speech • suprasegmentals are those aspects of speech not attributable to specific speech sounds • these include ... • stress • duration • pitch • juncture

  8. equipment • input transducer • VU meter and amplifier • attenuator (hearing level dial) • output transducer

  9. test environment • normally sound treated booth - mandatory for mlv • recommend CDs whenever possible

  10. patient’s and clinician’s role • patient must understand the speech stimuli • open set - repeat words/phrases or write it down • closed set - multiple choice check-off or picture pointing • clinician must make sure that stimuli is presented properly

  11. speech thresholds • speech awareness (aka speech detection) threshold • speech-recognition threshold (SRT) - lowest intensity where 50% of spondees correctly identified • purpose of SRT • stimuli - spondees • procedures

  12. MCL & UCL • most comfortable loudness level (MCL) • found about midway between SRT and UCL • uncomfortable loudness level • normally between 85 and 105 dB (even for those w/ sensorineural hearing loss)

  13. speech-recognition testing • purpose • stimuli • monosyllabic word lists - W-22, NU-6, high frequency lists, etc. • syllables and sentences - nonsense syllables, SPIN, CID everyday sentences, etc. • pictures - WIPI, NU-CHIPS, etc.

  14. speech audiometry • example of nu-6 word list • 50 monosyllabic, phonemically balanced words • stimuli • base, mess, cause, mop, good, luck, walk, youth, etc.

  15. speech audiometry • example of the word intelligibility by picture identification (WIPI). • 25 monosyllabic words - appropriate for children 4 to 6.

  16. audibility index • description • ratio or percentage • high frequencies (e.g., 2kHz) more heavily weighted. • correlates with hearing handicap • how is it determined?

  17. summary

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