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Megaxyela fulvago Stephan M. Blank & Katja Kramp & David R. Smith & Yuri N. Sundukov & Meicai Wei & Akihiko Shinohara 2017, sp. nov. ...
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Megaxyela euchroma Stephan M. Blank & Katja Kramp & David R. Smith & Yuri N. Sundukov & Meicai Wei & Akihiko Shinohara 2017, sp. nov. ...
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Megaxyela fulvago Stephan M. Blank & Katja Kramp & David R. Smith & Yuri N. Sundukov & Meicai Wei & Akihiko Shinohara 2017, sp. nov. ...
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Megaxyela euchroma Stephan M. Blank & Katja Kramp & David R. Smith & Yuri N. Sundukov & Meicai Wei & Akihiko Shinohara 2017, sp. nov. ...
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Speaker-Sex Discrimination for Voiced and Whispered Vowels at Short Durations
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Pristaulacus thailandensis Turrisi & Smith 2011, sp. nov. ...
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Pristaulacus thailandensis Turrisi & Smith 2011, sp. nov. ...
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How the Human Brain Recognizes Speech in the Context of Changing Speakers
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Abstract:
We understand speech from different speakers with ease, whereas artificial speech recognition systems struggle with this task. It is unclear how the human brain solves this problem. The conventional view is that speech message recognition and speaker identification are two separate functions and that message processing takes place predominantly in the left hemisphere, whereas processing of speaker-specific information is located in the right hemisphere. Here, we distinguish the contribution of specific cortical regions, to speech recognition and speaker information processing, by controlled manipulation of task and resynthesized speaker parameters. Two functional magnetic resonance imaging studies provide evidence for a dynamic speech-processing network that questions the conventional view. We found that speech recognition regions in left posterior superior temporal gyrus/superior temporal sulcus (STG/STS) also encode speaker-related vocal tract parameters, which are reflected in the amplitude peaks of the speech spectrum, along with the speech message. Right posterior STG/STS activated specifically more to a speaker-related vocal tract parameter change during a speech recognition task compared with a voice recognition task. Left and right posterior STG/STS were functionally connected. Additionally, we found that speaker-related glottal fold parameters (e.g., pitch), which are not reflected in the amplitude peaks of the speech spectrum, are processed in areas immediately adjacent to primary auditory cortex, i.e., in areas in the auditory hierarchy earlier than STG/STS. Our results point to a network account of speech recognition, in which information about the speech message and the speaker’s vocal tract are combined to solve the difficult task of understanding speech from different speakers.
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URL: https://doi.org/10.1523/JNEUROSCI.2742-09.2010 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2824128 http://www.ncbi.nlm.nih.gov/pubmed/20071527
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Discrimination of speaker sex and size when glottal-pulse rate and vocal-tract length are controlleda)
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The processing and perception of size information in speech soundsa)
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The interaction of glottal-pulse rate and vocal-tract length in judgements of speaker size, sex, and agea)
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Rater consistency and judgment in the direct assessment of second language writing ability within the certificates in spoken and written English
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