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Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
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Amplification Self-Adjustment: Controls and Repeatability.

Arthur Boothroyd1, Jennifer Retana, Carol L Mackersie

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|October 15, 2021
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Summary
This summary is machine-generated.

Self-adjusting hearing aid amplification is repeatable and effective for adults with hearing loss. The explore-and-select method provides consistent results regardless of control number or order, improving audibility.

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Area of Science:

  • Audiology
  • Hearing Science
  • Speech and Hearing Disorders

Background:

  • Hearing aid amplification requires precise adjustment for optimal patient benefit.
  • Self-adjustment procedures offer a patient-centered approach to hearing aid fitting.
  • Previous research explored self-adjustment, necessitating further investigation into parameter optimization.

Purpose of the Study:

  • To evaluate the impact of reducing adjustment controls from three to two on hearing aid amplification self-adjustment.
  • To assess the effect of initiating adjustment with high-frequency versus overall output.
  • To determine the repeatability of individual self-adjustments and their effect on phoneme recognition.
  • To gather listener feedback on the self-adjustment process.

Main Methods:

  • Twenty-two adults with hearing loss underwent monaural self-adjustment of amplification using connected speech.
  • Real ear output spectra were measured and compared to NAL-NL2 prescriptions.
  • Phoneme recognition was assessed at varying output levels relative to starting and adjusted conditions.
  • Participants completed questionnaires regarding their experience and preferences.

Main Results:

  • Reducing controls to two decreased adjustment time by 50% with minimal impact on output response.
  • High-frequency initiated adjustments resulted in a slight reduction in low-frequency output.
  • Individual self-adjustments were within ±5 dB of NAL-NL2 targets for most participants.
  • Phoneme recognition was not significantly affected by ±7 dB output changes post-adjustment.

Conclusions:

  • The explore-and-select self-adjustment procedure yields repeatable amplification settings for adults with hearing loss.
  • The number and order of adjustment parameters have a limited effect on the final outcome.
  • This method effectively positions listeners for optimal speech understanding, supporting its clinical utility.