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Updated: May 14, 2026
07:52
An Automated System for Sound Localization Testing in Hearing-Impaired Listeners
Published on: March 13, 2026
Linking dynamic-range compression across the ears can improve speech intelligibility in spatially separated noise
Ian M Wiggins1, Bernhard U Seeber
1MRC Institute of Hearing Research, University Park, Nottingham, NG7 2RD, United Kingdom. Ian.Wiggins@nottingham.ac.uk
The Journal of the Acoustical Society of America
|February 1, 2013
Summary
Linked hearing devices improve speech intelligibility by coordinating dynamic-range compression. This technology enhances the speech-to-noise ratio (SNR), offering significant benefits for hearing aid users.
Area of Science:
- Audiology
- Speech processing
- Hearing aid technology
Background:
- Modern hearing devices offer wireless coordination of dynamic-range compression between ears.
- Understanding the impact of linked compression on speech intelligibility in noise is crucial.
Purpose of the Study:
- To investigate if coordinating dynamic-range compression across ears improves speech intelligibility in steady noise.
- To analyze how linked compression affects interaural level differences (ILDs) and speech-to-noise ratio (SNR).
Main Methods:
- Speech intelligibility tests were conducted with normal-hearing listeners using linked and unlinked compression.
- Analysis of compressor behavior and its effect on ILDs and apparent SNR.
- Utilized a speech intelligibility model for predictive analysis.
Main Results:
- Linked compression significantly improved speech intelligibility compared to unlinked compression.
- Performance with linked compression was comparable to no compression.
- The benefit of linked compression was attributed to improved SNR at the better ear, not ILD preservation.
Conclusions:
- Coordinated dynamic-range compression in hearing devices enhances speech intelligibility in noise.
- Linked compression offers a potential significant improvement for bilateral hearing aid users, up to ten percentage points.
- The findings support the use of linked compression strategies in advanced hearing aid technology.
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