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Rate Discrimination Training May Partially Restore Temporal Processing Abilities from Age-Related Deficits.

Samira Anderson1, Lindsay DeVries2, Edward Smith2

  • 1Department of Hearing and Speech Sciences, University of Maryland, College Park, 20742, USA. sander22@umd.edu.

Journal of the Association for Research in Otolaryngology : JARO
|August 10, 2022
PubMed
Summary

Auditory training improved speech timing perception in older adults, restoring some age-related declines. Cognitive functions like attention also played a role in these auditory processing gains.

Keywords:
AgingAuditory TrainingAuditory steady-state responseSpeech perceptionTemporal processing

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Cognitive Neuroscience

Background:

  • Age-related hearing difficulties often stem from impaired temporal processing, impacting speech comprehension in noisy environments.
  • Understanding speech in complex settings relies on the brain's precise processing of speech signal timing.

Purpose of the Study:

  • To investigate the impact of rate discrimination training on auditory temporal processing in different age and hearing groups.
  • To assess if auditory training can mitigate age-related declines in temporal processing.

Main Methods:

  • A double-blind, randomized control study with 77 participants (young normal-hearing, older normal-hearing, older hearing-impaired).
  • Experimental group received rate discrimination training; active control group performed tone detection.
  • Pre- and post-training assessments included perceptual rate discrimination and auditory steady-state responses (ASSRs) to pulse trains.

Main Results:

  • Significant improvements in perceptual and ASSR measures at trained frequencies (100 and 300 Hz) for the experimental group compared to the control.
  • Older listeners' post-training performance matched younger listeners' pre-training levels.
  • Training benefits generalized to untrained frequencies (200 and 400 Hz) and correlated with improved recognition of reverberant speech.

Conclusions:

  • Auditory training can partially restore age-related deficits in temporal processing.
  • Cognitive functions, specifically attention, are linked to improvements in auditory training outcomes.
  • These findings suggest a potential for auditory interventions to enhance communication abilities in older adults.