Masking period patterns and forward masking for speech-shaped noise: Age-related effects

John H. Grose, Denise C. Menezes, Heather L. Porter, Silvana Griz

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Objective: The purpose of this study was to assess age-related changes in temporal resolution in listeners with relatively normal audiograms. The hypothesis was that increased susceptibility to nonsimultaneous masking contributes to the hearing difficulties experienced by older listeners in complex fluctuating backgrounds. Design: Participants included younger (n = 11), middle-age (n = 12), and older (n = 11) listeners with relatively normal audiograms. The first phase of the study measured masking period patterns for speechshaped noise maskers and signals. From these data, temporal window shapes were derived. The second phase measured forward-masking functions and assessed how well the temporal window fits accounted for these data. Results: The masking period patterns demonstrated increased susceptibility to backward masking in the older listeners, compatible with a more symmetric temporal window in this group. The forward-masking functions exhibited an age-related decline in recovery to baseline thresholds, and there was also an increase in the variability of the temporal window fits to these data. Conclusions: This study demonstrated an age-related increase in susceptibility to nonsimultaneous masking, supporting the hypothesis that exacerbated nonsimultaneous masking contributes to age-related difficulties understanding speech in fluctuating noise. Further support for this hypothesis comes from limited speech-in-noise data, suggesting an association between susceptibility to forward masking and speech understanding in modulated noise.

Original languageEnglish (US)
Pages (from-to)48-54
Number of pages7
JournalEar and hearing
Volume37
Issue number1
DOIs
StatePublished - 2016

Keywords

  • Aging
  • Forward masking
  • Masking period pattern
  • Temporal processing
  • Temporal window

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Speech and Hearing

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