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Related Experiment Videos

Hearing-aid-processed tone pips: electroacoustic and ABR characteristics.

E Brown1, A J Klein, K A Snydee

  • 1Department of Otolaryngology and Communicative Sciences, University of South Carolina, Charleston, USA.

Journal of the American Academy of Audiology
|August 15, 2000
PubMed
Summary

Hearing aid output limiting circuits do not significantly affect auditory brainstem response (ABR) recordings with tone-pip stimuli. Cochlear output saturation was observed at high stimulus levels in normal-hearing adults.

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Area of Science:

  • Audiology
  • Neuroscience
  • Biomedical Engineering

Background:

  • Auditory Brainstem Response (ABR) can assess hearing aid benefit in infants.
  • Understanding hearing aid acoustics is crucial for accurate ABR interpretation.

Purpose of the Study:

  • To evaluate the acoustic impact of hearing aid output limiting circuits on tone-pip stimuli.
  • To determine how these processed stimuli influence ABR characteristics.

Main Methods:

  • Constructed electroacoustic input/output functions for three limiting circuits (wide dynamic range compression, output compression, linear peak clipping) using tone-pip stimuli.
  • Measured Wave V latency and amplitude functions in five normal-hearing adults with the same stimuli and hearing aid settings.

Main Results:

Related Experiment Videos

  • None of the tested output limiting circuits effectively activated with tone-pip stimuli compared to continuous tones.
  • Aided Wave V latency and amplitude functions showed saturation at high stimulus levels, indicating cochlear saturation.

Conclusions:

  • Tone-pip stimuli may not adequately engage hearing aid output limiting circuits.
  • Cochlear saturation is a factor in ABR measurements at high stimulus levels with hearing aids.