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Related Experiment Video

Updated: Jan 12, 2026

Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Modeling the Relationship Between Listener Factors and Envelope Fidelity: A Pooled Analysis Spanning a Decade.

Varsha Rallapalli1, Jeffery Crukley2,3,4, Emily Lundberg5

  • 1Department of Communication Sciences & Disorders, University of South Florida, Tampa, Florida, USA.

Ear and Hearing
|November 3, 2025
PubMed
Summary
This summary is machine-generated.

Working memory significantly impacts speech intelligibility in hearing aid users. Higher working memory improves word recognition, especially in noisy conditions, highlighting the need for personalized hearing loss treatment beyond audiograms.

Keywords:
AgeHearing aidsSignal processingWorking memory

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Area of Science:

  • Audiology and Speech Science
  • Cognitive Neuroscience
  • Signal Processing

Background:

  • Hearing aid effectiveness varies significantly among individuals despite current individualized adjustments.
  • Existing research on speech intelligibility variability is limited by diverse methodologies and outcome measures across studies.

Purpose of the Study:

  • To model individual variability in hearing aid speech intelligibility using a pooled analysis of four distinct studies.
  • To identify key factors influencing speech intelligibility beyond audiometric measures.

Main Methods:

  • A hierarchical Beta-Binomial model was used on pooled data from 80 listeners with mild to moderately severe hearing loss.
  • Speech recognition was assessed in multi-talker babble across various signal-to-noise ratios.
  • Cumulative envelope fidelity and working memory (reading span test) were quantified.

Main Results:

  • Speech intelligibility strongly correlated with envelope fidelity, consistent with prior findings.
  • Working memory significantly influenced the speech intelligibility-envelope fidelity relationship.
  • Age and hearing loss severity did not significantly affect this relationship.

Conclusions:

  • Individual variability in aided speech intelligibility is linked to working memory capacity.
  • Cumulative envelope fidelity, influenced by noise and hearing aid processing, affects intelligibility.
  • Auditory metrics like envelope fidelity may aid clinical decision-making for personalized hearing loss management.