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Objective evaluation of aided thresholds using auditory steady-state responses

T W Picton1, A Durieux-Smith, S C Champagne

  • 1Rotman Research Institute at Baycrest Centre for Geriatric Care, University of Toronto, Ontario, Canada.

Journal of the American Academy of Audiology
|November 7, 1998
PubMed
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This study demonstrates a new method for objectively measuring hearing aid effectiveness in children. Auditory steady-state responses accurately predict aided hearing thresholds, aiding those unable to complete traditional tests.

Area of Science:

  • Audiology
  • Hearing Science
  • Biomedical Engineering

Background:

  • Assessing aided hearing thresholds in hearing-impaired children is challenging due to reliance on behavioral responses.
  • Objective electrophysiologic measures are needed for accurate hearing aid fitting and verification.

Purpose of the Study:

  • To evaluate the efficacy of auditory steady-state responses (ASSRs) for objectively determining aided hearing thresholds in hearing-impaired children.
  • To compare ASSR-derived thresholds with behavioral thresholds in a hearing aid user group.

Main Methods:

  • ASSRs were recorded in 35 hearing-impaired children using hearing aids.
  • Stimuli included amplitude-modulated tones (80-105 Hz) at carrier frequencies of 500, 1000, 2000, and 4000 Hz.
  • Responses were measured at intensities near behavioral thresholds in the aided condition.

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Main Results:

  • Physiologic thresholds derived from ASSRs closely approximated behavioral thresholds.
  • Average differences between physiologic and behavioral thresholds ranged from 13 to 17 dB across carrier frequencies.
  • The technique proved reliable for assessing aided thresholds objectively.

Conclusions:

  • Auditory steady-state responses offer a promising objective method for evaluating hearing aid performance in pediatric populations.
  • This technique can aid audiologists in fitting hearing aids for children who struggle with behavioral audiometry.
  • Objective measures like ASSRs enhance the accuracy and efficiency of pediatric audiological assessments.