speech audiometry

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Author:
jacwill
ID:
259685
Filename:
speech audiometry
Updated:
2014-02-01 17:59:28
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355 aud
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Description:
aud
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  1. why is speech aud important
    because the hearing loss that is inferred from a pure tone audio can not depict, beyond the grossest generalization, the degree of disability in speech communication caused by a hearing loss
  2. most complaints from individuals
    • in children, difficulty hearing
    • in adults, understanding
  3. MCL
    LDL
    SDS
    • MOST COMFORTABLE
    • LOUDNESS DISCOMFORT 
    • SPEECH DISCRIMINATION SCORE-ABILITY TO DISCRIMINATE SOUNDS OF SPEECH
  4. problems inherent with speech testing
    • misinterpretation of patients response
    • talkback systems
    • need for picutre testing (the WIPI)
  5. sat/sdt
    • speech awareness thresh 
    • simple I can hear speech, by raise of hand or the like
    • speech detection thresh = percentage of words that not saying back
  6. srt
    • speech recognition thresh
    • say it back to examiner 
    • point at which 50% of words can be correctly identified hot dog, birthday etc.
  7. will srt or sdt/sat be louder
    srt because more intense
  8. range of mcl
    about 100-110 db
  9. ldl or ucl
    level of speech that is uncomfortably loud
  10. dynamic range
    • arithmetic range btw comfortable loudness and uncomfortable loudness
    • usually is around 100 db or greater for normal hearing individuals
  11. speech recognition testing/ speech discrimination testing
    • ability to understand
    • can be improved by 
    •     decreasing distance from listener to speaker
    •     incre intensity of speakers voice
    • presented at 30-40 db above srt
  12. types of speech materials used when testing
    • nonsense syllables
    • digits
    • monosyllabic words
    • sentences-open and closed
    • most commonly used=phonetically balanced word lists 
    •     means that lists contain all the phonetic elements of connected english discourse in their normal proportion to one another
  13. cnc
    • consonant/neucleus/consonant
    • developed because no true balance of list that are phonetically categorized
  14. test for speech recognition
    • picture id test pit
    •     for adults who are not able to produce verbal resoponse
    • wipi
    • nu chips
  15. srs
    quick sin
    spin
    • speech recognition sentences-cause speech patterns change over time and provide more realistic test. 10 sentences of 7 words, carries no meaning. patient point to correct sentence
    • qsin-6 sentences presented with 4 talker babble, identify 5 key words
    • spin-speech perception in noise made up of 50 sentences and last word is test item, voice babble in background
  16. audibility index
    • ai
    • estimation of persons speech recognition based on amount of speech signal that is audible
    • %

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