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Effect of age on envelope regularity discrimination.

Brian C J Moore1, Vinay2

  • 1Department of Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom.

The Journal of the Acoustical Society of America
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Older adults show poorer envelope regularity discrimination (ERD) compared to younger adults, regardless of sound level. This age-related decline in auditory processing may be linked to synaptopathy.

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Area of Science:

  • Audiology
  • Neuroscience
  • Gerontology

Background:

  • Auditory perception declines with age, even with normal hearing thresholds.
  • Envelope regularity discrimination (ERD) is crucial for understanding speech and environmental sounds.
  • Age-related synaptopathy may impact neural processing of auditory information.

Purpose of the Study:

  • To compare envelope regularity discrimination (ERD) between young and older adults.
  • To investigate the effects of sound presentation level on ERD.
  • To explore the relationship between ERD and age-related auditory changes.

Main Methods:

  • Used the envelope regularity discrimination (ERD) test with varying irregularity.
  • Presented stimuli at 80 dB SPL and 20 dB SL with threshold-equalizing noise.
  • Recruited young and older adults with normal audiometric thresholds.

Main Results:

  • Older adults performed worse on the ERD test than younger adults.
  • Performance was better at 80 dB SPL compared to 20 dB SL.
  • ERD thresholds did not correlate with absolute hearing thresholds at 2000 Hz.

Conclusions:

  • Older adults exhibit impaired envelope regularity discrimination.
  • Age-related decline in ERD may be associated with synaptopathy.
  • Sound presentation level influences auditory envelope processing.