Document Detail

Gap detection in school-age children and adults: Effects of inherent envelope modulation and the availability of cues across frequency.
MedLine Citation:
PMID:  24686553     Owner:  NLM     Status:  Publisher    
PURPOSE The present study evaluated the effects of inherent envelope modulation and the availability of cues across frequency on behavioral gap detection with noise-band stimuli in school-age children. METHODS Listeners were normal-hearing adults and 5.2- to 15.6-year-olds. Stimuli were continuous bands of noise centered on 2000 Hz, either 1000 or 25 Hz wide. In addition to Gaussian noise at these bandwidths, there were conditions using 25-Hz-wide noise bands modified to either accentuate or minimize inherent envelope modulation (staccato and low-fluctuation noise, respectively). RESULTS Within the 25-Hz-wide conditions, adults' gap detection thresholds were highest in the staccato, lower in the Gaussian, and lowest in the low-fluctuation noise. Similar trends were evident in children's thresholds, although inherent envelope modulation had a smaller effect on children than adults. Whereas adults' thresholds were comparable for the 1000-Hz-wide Gaussian and 25-Hz-wide low-fluctuation stimulus, children's performance converged on adults' at a younger age for the 1000-Hz-wide Gaussian stimulus. CONCLUSIONS Results are consistent with the idea that children are less susceptible to the disruptive effects of inherent envelope modulation than adults when detecting a gap in a narrowband noise. Further, the ability to use spectrally distributed gap detection cues appears to mature relatively early in childhood.
Emily Buss; Joseph W Hall; Heather Porter; John H Grose
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-2-1
Journal Detail:
Title:  Journal of speech, language, and hearing research : JSLHR     Volume:  -     ISSN:  1558-9102     ISO Abbreviation:  J. Speech Lang. Hear. Res.     Publication Date:  2014 Feb 
Date Detail:
Created Date:  2014-4-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9705610     Medline TA:  J Speech Lang Hear Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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