| Cortical encoding of signals in noise: effects of stimulus type and recording paradigm. | |
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MedLine Citation:
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PMID: 20890206 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: Perception-in-noise deficits have been demonstrated across many populations and listening conditions. Many factors contribute to successful perception of auditory stimuli in noise, including neural encoding in the central auditory system. Physiological measures such as cortical auditory-evoked potentials (CAEPs) can provide a view of neural encoding at the level of the cortex that may inform our understanding of listeners' abilities to perceive signals in the presence of background noise. To understand signal-in-noise neural encoding better, we set out to determine the effect of signal type, noise type, and evoking paradigm on the P1-N1-P2 complex. DESIGN: Tones and speech stimuli were presented to nine individuals in quiet and in three background noise types: continuous speech spectrum noise, interrupted speech spectrum noise, and four-talker babble at a signal-to-noise ratio of -3 dB. In separate sessions, CAEPs were evoked by a passive homogenous paradigm (single repeating stimulus) and an active oddball paradigm. RESULTS: The results for the N1 component indicated significant effects of signal type, noise type, and evoking paradigm. Although components P1 and P2 also had significant main effects of these variables, only P2 demonstrated significant interactions among these variables. CONCLUSIONS: Signal type, noise type, and evoking paradigm all must be carefully considered when interpreting signal-in-noise evoked potentials. Furthermore, these data confirm the possible usefulness of CAEPs as an aid to understand perception-in-noise deficits. |
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Authors:
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Curtis J Billings; Keri O Bennett; Michelle R Molis; Marjorie R Leek |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Ear and hearing Volume: 32 ISSN: 1538-4667 ISO Abbreviation: Ear Hear Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2010-12-23 Completed Date: 2011-04-29 Revised Date: 2012-02-02 |
Medline Journal Info:
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Nlm Unique ID: 8005585 Medline TA: Ear Hear Country: United States |
Other Details:
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Languages: eng Pagination: 53-60 Citation Subset: IM |
Affiliation:
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National Center for Rehabilitative Auditory Research, Portland VA Medical Center, Portland, Oregon, USA. curtis.billings2@va.gov |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation
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methods* Adult Electroencephalography Evoked Potentials, Auditory / physiology* Female Humans Male Perceptual Masking / physiology* Signal Processing, Computer-Assisted Sound Spectrography Speech Perception / physiology* Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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R01 DC000626-23/DC/NIDCD NIH HHS; R01 DC000626-24/DC/NIDCD NIH HHS; R01 DC00626/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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