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Evaluation of the effects of nonlinear frequency compression on speech recognition and sound quality for adults with mild to moderate hearing loss.

Objective: While potentially improving audibility for listeners with considerable high frequency hearing loss, the effects of implementing nonlinear frequency compression (NFC) for listeners with moderate high frequency hearing loss are unclear. The purpose of this study was to investigate the effec...

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Published in:International Journal of Audiology Vol. 54; no. 3; pp. 162 - 170
Main Authors: Picou, Erin M., Marcrum, Steven C., Ricketts, Todd A.
Format: research tables/charts Journal Article
Published: Taylor & Francis Ltd Mar2015
Online Access:View this record in EBSCOhost
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        14992027
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      jtl: International Journal of Audiology
      issn: 14992027
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      dt: Mar2015
      vid: 54
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      pub: Taylor & Francis Ltd
      place: Philadelphia, Pennsylvania
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        10.3109/14992027.2014.961662
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        atl: Evaluation of the effects of nonlinear frequency compression on speech recognition and sound quality for adults with mild to moderate hearing loss.
      aug:
        au:
          Picou, Erin M.
          Marcrum, Steven C.
          Ricketts, Todd A.
        affil: Deparment of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, USA
      sug:
        subj:
          Hearing Disorders
          Speech Intelligibility
          Consonants
          Word Lists
          Human
          Adult
          Middle Age
          Aged
          Hearing Aid Fitting
          Analysis of Variance
          Adult: 19-44 years
          Middle Aged: 45-64 years
          Aged: 65+ years
      ab: Objective: While potentially improving audibility for listeners with considerable high frequency hearing loss, the effects of implementing nonlinear frequency compression (NFC) for listeners with moderate high frequency hearing loss are unclear. The purpose of this study was to investigate the effects of activating NFC for listeners who are not traditionally considered candidates for this technology. Design: Participants wore study hearing aids with NFC activated for a 3-4 week trial period. After the trial period, they were tested with NFC and with conventional processing on measures of consonant discrimination threshold in quiet, consonant recognition in quiet, sentence recognition in noise, and acceptableness of sound quality of speech and music. Study sample: Seventeen adult listeners with symmetrical, mild to moderate sensorineural hearing loss participated. Better ear, high frequency pure-tone averages (4, 6, and 8 kHz) were 60 dB HL or better. Results: Activating NFC resulted in lower (better) thresholds for discrimination of /s/, whose spectral center was 9 kHz. There were no other significant effects of NFC compared to conventional processing. Conclusion: These data suggest that the benefits, and detriments, of activating NFC may be limited for this population.
      pubtype: Academic Journal
      doctype:
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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