An Examination of Speech Recognition in a Modulated Background and of Forward Masking in Younger and Older Listeners.
Purpose: To compare speech intelligibility in the presence of a 10-Hz square-wave noise masker in younger and older listeners and to relate performance to recovery from forward masking. Method: The signal-to-noise ratio required to achieve 50% sentence identification in the presence of a 10-Hz squar...
| Published in: | Journal of Speech, Language & Hearing Research Vol. 50; no. 4; pp. 857 - 865 |
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| Main Authors: | , , |
| Format: | Article |
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American Speech-Language-Hearing Association
August 2007
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=507992751&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 507992751 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: August 2007 vid: 50 iid: 4 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 507992751 10.1044/1092-4388(2007/060) ppf: 857 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P size: 188KB tig: atl: An Examination of Speech Recognition in a Modulated Background and of Forward Masking in Younger and Older Listeners. aug: au: Gifford, René H. Bacon, Sid P. Williams, Erica J. su: Age (Psychology) Auditory masking Speech perception Intelligibility of speech sug: subj: Age (Psychology) Auditory masking Speech perception Intelligibility of speech ab: Purpose: To compare speech intelligibility in the presence of a 10-Hz square-wave noise masker in younger and older listeners and to relate performance to recovery from forward masking. Method: The signal-to-noise ratio required to achieve 50% sentence identification in the presence of a 10-Hz square-wave noise masker was obtained for each of the 8 younger/older listener pairs. Listeners were matched according to their quiet thresholds for frequencies from 600 to 4800 Hz in octave steps. Forward masking was also measured in 2 younger/older threshold-matched groups for signal delays of 2-40 ms. Results: Older listeners typically required a significantly higher signal-to-noise ratio than younger listeners to achieve 50% correct sentence recognition. This effect may be understood in terms of increased forward-masked thresholds throughout the range of signal delays corresponding to the silent intervals in the modulated noise (e.g., <50 ms). Conclusions: Significant differences were observed between older and younger listeners on measures of both speech intelligibility in a modulated background and forward masking over a range of signal delays (0-40 ms). Age-related susceptibility to forward masking at relatively short delays may reflect a deficit in processing at a fairly central level (e.g., broader temporal windows or less efficient processing). Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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