Familiarity affects environmental sound processing outside the focus of attention : an event-related potential study

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Kirmse_2-153e4wmidx7a03.pdf(733.87 KB)
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2009
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Jacobsen, Thomas
Schröger, Erich
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urn:nbn:de:bsz:352-2-153e4wmidx7a03
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10.1016/j.clinph.2009.02.159
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Clinical neurophysiology ; 120 (2009), 5. - pp. 887-896. - ISSN 1388-2457. - eISSN 1872-8952
Abstract
Objective
This study investigated the influence of the familiarity of an environmental sound on sound processing outside the focus of attention.

Methods
By comparing ERPs elicited by a familiar, animal sound and an acoustically matched, but unfamiliar, complex sound, three issues were addressed: (a) general differences in the processing of the familiar and the unfamiliar sound, (b) influences of sound familiarity on the processing of deviants unrelated to familiarity and (c) familiarity-specific processing depending on the sound context. Participants watched a silent, subtitled movie.

Results
The familiar sound elicited a centro-parietal enhancement of the N1, a frontocentrally enhanced P2 and an additional P250. Auditory deviance processing elicited by deviants in sound location was not influenced by the familiarity of the sounds. However, after an involuntary switch of attention to the deviant, an N400-like deflection indicated enhanced semantic analysis of the familiar deviant. Familiarity-specific ERP effects as a consequence of the sound context occurred between 300 and 500 ms after stimulus onset.

Conclusion
Whereas familiarity of an environmental sound elicited enhanced stimulus processing before 300 ms, influences of the sound context were observed subsequent to 300 ms.

Significance
Familiarity of a complex environmental sound influences several stages of auditory processing outside the focus of attention.
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Subject (DDC)
150 Psychology
Keywords
Familiarity affects; environmental sound processing; attention
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ISO 690KIRMSE, Ursula, Thomas JACOBSEN, Erich SCHRÖGER, 2009. Familiarity affects environmental sound processing outside the focus of attention : an event-related potential study. In: Clinical neurophysiology. 120(5), pp. 887-896. ISSN 1388-2457. eISSN 1872-8952. Available under: doi: 10.1016/j.clinph.2009.02.159
BibTex
@article{Kirmse2009-05Famil-41566,
  year={2009},
  doi={10.1016/j.clinph.2009.02.159},
  title={Familiarity affects environmental sound processing outside the focus of attention : an event-related potential study},
  number={5},
  volume={120},
  issn={1388-2457},
  journal={Clinical neurophysiology},
  pages={887--896},
  author={Kirmse, Ursula and Jacobsen, Thomas and Schröger, Erich}
}
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    <dcterms:abstract xml:lang="eng">Objective&lt;br /&gt;This study investigated the influence of the familiarity of an environmental sound on sound processing outside the focus of attention.&lt;br /&gt;&lt;br /&gt;Methods&lt;br /&gt;By comparing ERPs elicited by a familiar, animal sound and an acoustically matched, but unfamiliar, complex sound, three issues were addressed: (a) general differences in the processing of the familiar and the unfamiliar sound, (b) influences of sound familiarity on the processing of deviants unrelated to familiarity and (c) familiarity-specific processing depending on the sound context. Participants watched a silent, subtitled movie.&lt;br /&gt;&lt;br /&gt;Results&lt;br /&gt;The familiar sound elicited a centro-parietal enhancement of the N1, a frontocentrally enhanced P2 and an additional P250. Auditory deviance processing elicited by deviants in sound location was not influenced by the familiarity of the sounds. However, after an involuntary switch of attention to the deviant, an N400-like deflection indicated enhanced semantic analysis of the familiar deviant. Familiarity-specific ERP effects as a consequence of the sound context occurred between 300 and 500 ms after stimulus onset.&lt;br /&gt;&lt;br /&gt;Conclusion&lt;br /&gt;Whereas familiarity of an environmental sound elicited enhanced stimulus processing before 300 ms, influences of the sound context were observed subsequent to 300 ms.&lt;br /&gt;&lt;br /&gt;Significance&lt;br /&gt;Familiarity of a complex environmental sound influences several stages of auditory processing outside the focus of attention.</dcterms:abstract>
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