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Speech-recognition performance after long-term hearing aid use.

Janet E Shanks1, Richard H Wilson, Patricia Stelmachowicz

  • 1Janet E. Shanks, Ph.D., Audiology 126, VA Long Beach Healthcare System, 5901 E. Seventh Street, Long Beach, CA 90822, USA. janet.shanks@va.gov

Journal of the American Academy of Audiology
|June 22, 2007
PubMed
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Long-term hearing aid use showed decreased speech recognition in adults with sensorineural hearing loss. However, hearing aid benefit remained significant, with aided performance consistently exceeding unaided performance.

Area of Science:

  • Audiology
  • Speech-language pathology
  • Biomedical engineering

Background:

  • A previous multicenter clinical trial by Larson et al. (2000) evaluated hearing aid performance in adults with symmetrical sensorineural hearing loss.
  • This follow-up study investigates the long-term hearing aid benefit in the same cohort after five to six years of device use.

Purpose of the Study:

  • To examine long-term hearing aid benefit in adults with sensorineural hearing loss.
  • To assess changes in speech recognition abilities after prolonged hearing aid use.

Main Methods:

  • 108 participants from the original study were enrolled, including current hearing aid users and nonusers.
  • Speech recognition was measured unaided and aided using NU-6 and California Consonant Test (CCT) in quiet and noise conditions.

Related Experiment Videos

  • Tests included varying signal-to-babble ratios and stimulus levels.

    • Main Results:

    • Speech recognition abilities significantly decreased compared to the original study across all tested conditions.
    • Decrements in speech recognition were observed irrespective of speech materials, test conditions, signal-to-babble ratios, or stimulus levels.
    • Despite reduced speech recognition, hearing aid benefit remained substantial, with aided performance consistently surpassing unaided performance.

    Conclusions:

    • Prolonged hearing aid use in adults with sensorineural hearing loss is associated with a decline in speech recognition.
    • Hearing aids continue to provide significant benefit, improving aided over unaided performance even after long-term use.
    • The complex interplay between stimulus level, signal-to-babble ratio, and speech recognition persists.