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Electrically Evoked Stapedius Reflex Measurements in Cochlear Implantation and Its Application in the Postoperative Fitting Process
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Can real-ear insertion gain deviations from generic fitting prescriptions predict self-reported outcomes?

Sreeram Kaithali Narayanan1, Palle Rye1, Tobias Piechowiak2

  • 1Section for AI and Sound, Department of Electronic Systems, Aalborg University, Aalborg, Denmark.

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Summary
This summary is machine-generated.

Hearing aid gain deviations impact outcomes, especially for experienced users. Minimal deviations from generic prescriptions correlate with better self-perceived hearing aid benefits in experienced individuals, but not first-time users.

Keywords:
Real-ear measurementgain prescriptionhearing aidsself-reported outcome

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Area of Science:

  • Audiology
  • Hearing Science
  • Biomedical Engineering

Background:

  • Hearing aid fitting aims to optimize audibility and speech understanding.
  • Individual hearing aid gain can differ from generic prescriptive targets.
  • Understanding factors influencing hearing aid outcomes is crucial for patient satisfaction.

Purpose of the Study:

  • To investigate if hearing aid insertion gain differences from generic prescriptions predict self-reported outcomes.
  • To compare prediction accuracy for first-time versus experienced hearing aid users.

Main Methods:

  • Prospective observational study involving 885 first-time and 330 experienced hearing aid users.
  • Real-ear measurements and validated questionnaires (SSQ12, IOI-HA) were utilized.
  • K-means clustering analyzed gain differences between real-ear insertion gain and NAL-NL2, NAL-RP, and one-third gain rules.

Main Results:

  • Gain differences at higher frequencies were key differentiators in clustering.
  • Experienced users with fittings closer to NAL-NL2 and NAL-RP prescriptions reported higher overall benefit (IOI-HA Factor 1).
  • Gain deviations did not significantly impact other self-reported outcomes for either user group.

Conclusions:

  • Experienced hearing aid users with minimal gain deviations from generic prescriptions reported better self-perceived benefits.
  • This association between minimal gain deviation and improved outcomes was not observed in first-time hearing aid users.
  • Real-ear insertion gain relative to generic targets may be a significant factor for experienced user satisfaction.