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Fricative Perception in Normal-Hearing and Hearing-Impaired Children and Adults

Fricative Perception in Normal-Hearing and Hearing-Impaired Children and Adults. Andrea Pittman, Ph.D. Patricia Stelmachowicz, Ph.D. Boys Town National Research Hospital. Funded by a grant from NIH. Hearing-Impaired Adults. Normal-Hearing Children. Experience & Hearing Loss.

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Fricative Perception in Normal-Hearing and Hearing-Impaired Children and Adults

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  1. Fricative Perception in Normal-Hearing and Hearing-Impaired Children and Adults Andrea Pittman, Ph.D. Patricia Stelmachowicz, Ph.D. Boys Town National Research Hospital Funded by a grant from NIH

  2. Hearing-Impaired Adults Normal-Hearing Children Experience & Hearing Loss Normal-Hearing Adults Hearing-Impaired Children

  3. Methods Normal Hearing 11 Adults mean = 32:5 yrs. (22-42) 11 Children mean = 10:1 yrs. (8-11) Hearing Impaired 11 Adults mean = 61:11 yrs. (54-69) 11 Children mean = 10:3 yrs. (8-11)

  4. Stimuli Four nonsense syllables /us/, /uS/, /uf/, and /uT/ Three speakers an adult male an adult female a child Three segments vowel transition fricative Random attenuation

  5. Stimuli Four nonsense syllables /us/, /uS/, /uf/, and /uT/ Three speakers an adult male an adult female a child Three segments vowel transition fricative Random attenuation

  6. Short Term Audibility Index Audibility Index

  7. /us/ Adults Children Hearing Impaired Normal Hearing Hearing Impaired Normal Hearing Short-Term Audibility

  8. Performance-STA FunctionsFricative of /us/

  9. Performance-STA FunctionsFricative of /us/

  10. Performance-STA FunctionsFricative of /us/

  11. /uS/ Adults Children Normal Hearing Hearing Impaired Hearing Impaired Normal Hearing Short-Term Audibility

  12. Performance-STA FunctionsFricativeof /uS/

  13. Performance-STA FunctionsFricative of /uS/

  14. Performance-STA FunctionsFricative of /uS/

  15. Conclusions • The hearing-impaired groups required lower audibility than the normal-hearing groups to achieve the same level of performance. • short term vs. long term audibility • abnormal growth of response • An age effect was observed for /uS/ for the NH groups but not for the HI groups. • 8-year olds vs. younger children • influence of rehabilitative services

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