| On- and off-frequency compression estimated using a new version of the additivity of forward masking technique. | |
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MedLine Citation:
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PMID: 20707447 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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On- and off-frequency compression at the 4000- and 8000-Hz cochlear places were estimated using a new version of the additivity of forward masking (AFM) technique, that measures the effects of combining two non-overlapping forward maskers. Instead of measuring signal thresholds to estimate compression of the signal as in the original AFM technique, the decrease in masker threshold in the combined-masker condition compared to the individual-masker conditions is used to estimate compression of the masker at the signal place. By varying masker frequency it is possible to estimate off-frequency compression. The maskers were 500-Hz-wide bands of noise, and the signal was a brief pure tone. Compression at different levels was estimated using different overall signal levels, or different masker-signal intervals. It was shown that the new AFM technique and the original AFM technique produce consistent results. Considerable compression was observed for maskers well below the signal frequency, suggesting that the assumption of off-frequency linearity used in other techniques may not be valid. Reducing the duration of the first masker from 200 to 20 ms reduced the compression exponent in some cases, suggesting a possible influence of olivocochlear efferent activity. |
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Authors:
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Christopher J Plack; Dhany Arifianto |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 128 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-16 Completed Date: 2011-01-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 771-86 Citation Subset: IM |
Affiliation:
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Human Communication and Deafness Division, University of Manchester, Manchester M13 9PL, United Kingdom. chris.plack@manchester.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Audiometry, Pure-Tone Auditory Pathways / physiology* Auditory Perception* Auditory Threshold Cochlea / physiology* Humans Linear Models Models, Biological Olivary Nucleus / physiology Perceptual Masking* Pressure Reflex Time Factors Vibration Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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BB/D012953/1//Biotechnology and Biological Sciences Research Council |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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