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Effect of age on detection of gaps in speech and nonspeech markers varying in duration and spectral symmetry

Journal of the Acoustical Society of America, ISSN: 0001-4966, Vol: 119, Issue: 2, Page: 1143-1155
2006
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Article Description

Gap detection thresholds for speech and analogous nonspeech stimuli were determined in younger and older adults with clinically normal hearing in the speech range. Gap detection thresholds were larger for older than for younger listeners in all conditions, with the size of the age difference increasing with stimulus complexity. For both ages, gap detection thresholds were far smaller when the markers before and after the gap were the same (spectrally symmetrical) compared to when they were different (spectrally asymmetrical) for both speech and nonspeech stimuli. Moreover, gap detection thresholds were smaller for nonspeech than for speech stimuli when the markers were spectrally symmetrical but the opposite was observed when the markers were spectrally asymmetrical. This pattern of results may reflect the benefit of activating well-learned gap-dependent phonemic contrasts. The stimulus-dependent age effects were interpreted as reflecting the differential effects of age-dependent losses in temporal processing ability on within-and between-channel gap detection. © 2006 Acoustical Society of America.

Bibliographic Details

Pichora-Fuller, M Kathleen; Schneider, Bruce A; Benson, Nancy J; Hamstra, Stanley J; Storzer, Edward

Acoustical Society of America (ASA)

Arts and Humanities; Physics and Astronomy

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