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  The role of stimulus complexity, spectral overlap, and pitch for gap-detection thresholds in young and old listeners

Heinrich, A., de la Rosa, S., & Schneider, B. (2014). The role of stimulus complexity, spectral overlap, and pitch for gap-detection thresholds in young and old listeners. Journal of the Acoustical Society of America, 136(4): 1797, pp. 1-11. doi:10.1121/1.4894788.

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Heinrich, A, Author
de la Rosa, S1, 2, Author              
Schneider, BA, Author
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1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Thresholds for detecting a gap between two complex tones were determined for young listeners with normal hearing and old listeners with mild age-related hearing loss. The leading tonal marker was always a 20-ms, 250-Hz complex tone with energy at 250, 500, 750, and 1000thinsp;Hz. The lagging marker, also tonal, could differ from the leading marker with respect to fundamental frequency (f0), the presence versus absence of energy at f0, and the degree to which it overlapped spectrally with the leading marker. All stimuli were presented with steeper (1thinsp;ms) and less steep (4thinsp;ms) envelope rise and fall times. F0 differences, decreases in the degree of spectral overlap between the markers, and shallower envelope shape all contributed to increases in gap-detection thresholds. Age differences for gap detection of complex sounds were generally small and constant when gap-detection thresholds were measured on a log scale. When comparing the results for complex sounds to thresholds obtained for pure-tones in a previous study by Heinrich and Schneider [(2006). J. Acoust. Soc. Am. 119, 2316ndash;2326], thresholds increased in an orderly fashion from markers with identical (within-channel) pure tones to different (between-channel) pure tones to complex sounds. This pattern of results was true for listeners of both ages although younger listeners had smaller thresholds overall.

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 Dates: 2014-10
 Publication Status: Published in print
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 Identifiers: DOI: 10.1121/1.4894788
BibTex Citekey: HeinrichdS2014_2
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Title: Journal of the Acoustical Society of America
Source Genre: Journal
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Pages: - Volume / Issue: 136 (4) Sequence Number: 1797 Start / End Page: 1 - 11 Identifier: -