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Updated: Feb 15, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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Attentional Resources Are Needed for Auditory Stream Segregation in Aging.

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|January 10, 2018
PubMed
Summary

Aging impairs automatic sound processing, making it harder for older adults to separate sounds in noisy environments. This difficulty in automatic segregation contributes to increased listening effort and demands greater attentional resources.

Keywords:
auditory scene analysisautomatic processingevent-related potentials (ERPs)mismatch negativity (MMN)selective attention

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Area of Science:

  • Auditory Neuroscience
  • Gerontology
  • Cognitive Psychology

Background:

  • Difficulty in selecting desired sounds from background noise increases with age, even with normal hearing.
  • Previous studies show reduced sound stream segregation in older adults, but the underlying mechanisms remain unclear.

Purpose of the Study:

  • To investigate if impaired automatic sound processing contributes to age-related difficulties in selecting sound streams in noisy environments.
  • To test the hypothesis that aging affects automatic auditory stream segregation, impacting active sound selection.

Main Methods:

  • Electroencephalography (EEG) was used to record brain activity.
  • Participants performed an intensity oddball task with varying background sounds.
  • The study assessed the ability to automatically and actively segregate sounds.

Main Results:

  • Listeners could actively segregate sounds to perform the loudness detection task.
  • No evidence of automatic segregation of background sounds was observed when participants were engaged in a distracting task (watching a movie).
  • The ability to detect target tones correlated with the capacity for sound stream segregation.

Conclusions:

  • Automatic auditory processing appears to be impaired in older adults.
  • This impairment in automatic segregation likely leads to increased listening effort and attentional load.
  • Effortful listening and attentional system strain may explain age-related challenges in noisy auditory environments.