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Efficient characterization of individual differences in compression ratio preference.

Lucas S Baltzell1, Jing Xia1, Sridhar Kalluri1

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|December 8, 2018
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This summary is machine-generated.

This study developed a practical hearing aid test to determine individual preferences for wide dynamic range compression (WDRC) settings. The test efficiently identified preferred compression ratios (CRs) for hearing aid users in quiet and noisy environments.

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Area of Science:

  • Audiology
  • Hearing Science
  • Signal Processing

Background:

  • Wide dynamic range compression (WDRC) is crucial for modern hearing aids.
  • Fitting WDRC settings to individual users presents significant challenges.
  • Current methods for determining optimal compression ratios (CRs) can be time-consuming and impractical.

Purpose of the Study:

  • To develop a practical and efficient test for assessing individual listener preferences for CR settings.
  • To investigate individual differences in CR preferences across various listening conditions (speech-in-quiet, speech-in-noise).
  • To validate the developed preference learning test's accuracy and utility.

Main Methods:

  • Utilized Bayesian optimization for efficient preference learning of CR settings.
  • Conducted experiments with normal-hearing and hearing-impaired listeners.
  • Compared listener preferences to linear gain and audiogram-based CR prescriptions (National Acoustics Lab--Nonlinear 2).

Main Results:

  • The developed preference learning test accurately identified CR preferences in normal-hearing listeners.
  • Significant individual differences in CR preferences were observed in hearing-impaired listeners.
  • Listeners preferred the CR identified by the preference learning test over standard linear gain or prescriptive methods.

Conclusions:

  • A practical and efficient preference learning test for WDRC settings was successfully developed.
  • Individualized CR preferences vary significantly among hearing aid users.
  • This test offers a more personalized approach to hearing aid fitting than current prescriptive methods.