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Related Experiment Videos

A digital filterbank hearing aid. Improving a prescriptive fitting with subjective adjustments

T Lunner1, J Hellgren, S Arlinger

  • 1Department of Otorhinolaryngology, Linköping University, Sweden, Denmark. Thomas.Lunner@oto.liu.se

Scandinavian Audiology
|January 1, 1997
PubMed
Summary

A new hearing aid fitting algorithm, LinEar, was compared to the POGO II method. LinEar was rated significantly higher for overall sound quality, despite similar speech signal-to-noise ratios.

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Area of Science:

  • Audiology
  • Hearing Aid Technology

Background:

  • Traditional hearing aid fitting methods like POGO II rely on prescriptive formulas.
  • New algorithms offer potential for improved user satisfaction and audibility.

Purpose of the Study:

  • To compare the performance of a new linear hearing aid fitting algorithm (LinEar) against a prescriptive method (POGO II).
  • To evaluate user-perceived sound quality and objective speech-to-noise ratio (S/N) differences.

Main Methods:

  • A one-month blind field test involving eight subjects using a wearable digital hearing aid.
  • Comparison of LinEar (with user-adjusted frequency response) and POGO II fitting algorithms.
  • Both algorithms utilized seven frequency bands and two-channel compression limiting.

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Main Results:

  • Individual frequency response adjustments in LinEar showed greater variability compared to POGO II.
  • No significant differences were found in speech S/N measures between the two algorithms.
  • LinEar received significantly higher ratings for overall sound quality in both laboratory and field tests.

Conclusions:

  • The LinEar algorithm, allowing individual user adjustments, offers superior overall sound quality compared to the POGO II prescriptive method.
  • Further research may explore optimizing user-adjustable parameters within prescriptive frameworks for enhanced hearing aid fitting.