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Related Experiment Video

Updated: Jun 4, 2025

A Method to Study Adaptation to Left-Right Reversed Audition

A Method to Study Adaptation to Left-Right Reversed Audition

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Using the Mismatch Negativity to Evaluate Hearing Aid Directional Enhancement Based on Multistream Architecture.

Christopher Slugocki¹, Francis Kuk, Petri Korhonen

¹Office of Research in Clinical Amplification, WS Audiology, Lisle, Illinois, USA.

Ear and Hearing

|December 19, 2024

Summary

Hearing aid directivity using multistream architecture (MSA) improved the brain

Keywords:

Auditory-evoked potentials Hearing aids Hearing loss Mismatch negativity Speech-in-noise

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Area of Science:

Auditory Neuroscience
Speech Perception
Hearing Aid Technology

Background:

Hearing loss impacts speech perception in noise.
Mismatch negativity (MMN) reflects preattentive auditory processing.
Hearing aid features aim to improve speech understanding.

Purpose of the Study:

To investigate if hearing aid directivity, specifically multistream architecture (MSA), enhances mismatch negativity (MMN) to phonemic contrasts in noise.
To assess the impact of MSA on preattentive speech processing in older adults with hearing loss.

Main Methods:

A single-blind, within-subjects study with 15 older adults with moderate-to-severe hearing loss.
Participants completed a phonemic discrimination task to determine individualized signal-to-noise ratios (SNRs).
MMN was measured during passive listening to phonemic oddball sequences with MSA enabled (MSA-ON) and disabled (MSA-OFF).

Main Results:

MMN magnitudes were significantly larger in the MSA-ON condition compared to MSA-OFF.
MMN magnitudes showed a positive correlation with the degree of hearing loss.
MMN latency was influenced by the interaction between hearing aid condition and individualized SNRs, particularly in the MSA-OFF condition.

Conclusions:

Hearing aid directivity utilizing MSA enhances preattentive detection of phonemic contrasts in noisy environments.
The MMN is a valuable tool for evaluating the benefits of hearing aid features on speech-in-noise processing.