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Self-Adjusted Amplification Parameters Produce Large Between-Subject Variability and Preserve Speech Intelligibility
Peggy B Nelson1, Trevor T Perry1, Melanie Gregan1
11 Department of Speech-Language-Hearing Sciences, University of Minnesota, Minneapolis, MN, USA.
Trends in Hearing
|September 8, 2018
Summary
Listeners with hearing loss consistently prefer unique hearing aid gain settings. These self-adjusted preferences often differ from standard audiology prescriptions, even in noisy environments.
Area of Science:
- Audiology
- Hearing Science
- Speech Perception
Background:
- Hearing aid gain and compression parameters significantly impact speech understanding.
- Current hearing aid fitting methods rely on audiology-based prescriptions, which may not align with individual listener preferences.
- Self-fitting algorithms offer a novel approach to personalize hearing aid settings.
Purpose of the Study:
- To investigate listener preferences for hearing aid gain and compression parameters using a self-fitting algorithm.
- To compare self-adjusted hearing aid gain with audiologist-prescribed gain in quiet and noise conditions.
- To determine the impact of self-adjusted gain on speech intelligibility across different listening environments.
Main Methods:
- Thirty participants with mild to moderate sensorineural hearing loss utilized a self-fitting algorithm to adjust hearing aid gain.
- Listeners self-adjusted parameters in quiet and various noise conditions.
- Speech intelligibility was assessed across different signal-to-noise ratios for both self-adjusted and audiologist-fit gain settings.
Main Results:
- Consistent within-subject performance was observed in self-adjusted gain selection.
- Significant between-subject variability was found in preferred gain settings.
- Hearing aid gain selection did not substantially influence speech intelligibility within the tested signal-to-noise ratio range.
- Self-adjusted gain configurations frequently deviated from National Acoustic Laboratories-based prescriptions.
Conclusions:
- Individual listeners exhibit consistent preferences for hearing aid gain settings.
- Personalized, self-adjusted gain may be crucial for optimal hearing aid use.
- Current audiology-based prescriptions may not fully capture individual listener needs for gain in quiet and noise.
- Self-fitting algorithms hold promise for improving hearing aid satisfaction and effectiveness.
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