Cross-Frequency Integration for Consonant and Vowel Identification in Bimodal Hearing.

Purpose: Improved speech recognition in binaurally combined acoustic-electric stimulation (otherwise known as bimodal hearing) could arise when listeners integrate speech cues from the acoustic and electric hearing. The aims of this study were (a) to identify speech cues extracted in electric hearin...

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Published in:Journal of Speech, Language & Hearing Research Vol. 54; no. 3; pp. 959 - 981
Main Authors: Konga, Ying-Yee, Braidab, Louis D.
Format: research tables/charts Journal Article
Published: American Speech-Language-Hearing Association Jun2011
Online Access:View this record in EBSCOhost
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        10924388
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      jtl: Journal of Speech, Language & Hearing Research
      issn: 10924388
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      dt: Jun2011
      vid: 54
      iid: 3
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      pub: American Speech-Language-Hearing Association
      place: Rockville, Maryland
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        62655531
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        10.1044/1092-4388(2010/10-0197)
        62655531
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        atl: Cross-Frequency Integration for Consonant and Vowel Identification in Bimodal Hearing.
      aug:
        au:
          Konga, Ying-Yee
          Braidab, Louis D.
        affil: Northeastern University, Boston, MA
      sug:
        subj:
          Speech Perception
          Hearing
          Phonetics
          Human
          Funding Source
          Acoustic Stimulation
          Electric Stimulation
          Cochlear Implant
          Case Control Studies
          Female
          Male
          Adult
          Models, Statistical
          Goodness of Fit Chi Square Test
          Adolescence
          Middle Age
          Aged
          Adult: 19-44 years
          Adolescent: 13-18 years
          Middle Aged: 45-64 years
          Aged: 65+ years
          Female
          Male
      ab: Purpose: Improved speech recognition in binaurally combined acoustic-electric stimulation (otherwise known as bimodal hearing) could arise when listeners integrate speech cues from the acoustic and electric hearing. The aims of this study were (a) to identify speech cues extracted in electric hearing and residual acoustic hearing in the low-frequency region and (b) to investigate cochlear implant (CI) users' ability to integrate speech cues across frequencies. Method: Normal-hearing (NH) and CI subjects participated in consonant and vowel identification tasks. Each subject was tested in 3 listening conditions: CI alone (vocoder speech for NH), hearing aid (HA) alone (low-pass filtered speech for NH), and both. Integration ability for each subject was evaluated using a model of optimal integration—the PreLabeling integration model (Braida, 1991). Results: Only a few CI listeners demonstrated bimodal benefit for phoneme identification in quiet. Speech cues extracted from the CI and the HA were highly redundant for consonants but were complementary for vowels. CI listeners also exhibited reduced integration ability for both consonant and vowel identification compared with their NH counterparts. Conclusion: These findings suggest that reduced bimodal benefits in CI listeners are due to insufficient complementary speech cues across ears, a decrease in integration ability, or both.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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