Auditory cortical processing in noise in younger and older adults

Jennifer McCullagh, Jennifer B. Shinn

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Objective: A common clinical complaint among older adults is difficulty hearing in noise, even in those with normal or near-normal peripheral hearing sensitivity. Researchers have demonstrated behavioral hearing in noise deficits in older adults, but to date limited evidence, particularly objective, exists elucidating the effects of age on auditory cortical processing in noise. The purpose of this investigation was to explore age related differences in auditory cortical processing at multiple signal-to-noise ratios (SNRs). Study design: Twenty normal-hearing young adults and 15 normal-hearing older adults participated in the study. Late auditory evoked potential (N1 and P2) latencies and amplitudes were measured in quiet and at three signal-to-noise ratios (SNRs) (+ 20, + 10, and 0 SNR). Repeated measures analyses of variance (ANOVA) were utilized to determine if statistically significant differences existed. Results: Significant group by listening condition interactions existed for N1 and P2 amplitudes. P2 latencies were significantly longer for the older adult group compared to the younger adult group. In addition, N1 and P2 amplitudes were significantly smaller for the younger adult group compared to the older adult group. Conclusion: Results suggest a possibly greater reduction in the synchronous neuronal response from quiet to noisy conditions in older adults than in younger adults.

Original languageEnglish
Pages (from-to)182-190
Number of pages9
JournalHearing, Balance and Communication
Volume11
Issue number4
DOIs
StatePublished - Dec 2013

Keywords

  • Aging
  • Auditory late potentials
  • Hearing in noise
  • N1
  • P2

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Speech and Hearing

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