Alpha-band oscillation during speech recognition under different sensory conditions

Yanfei Lin, Zhiwen Liu*, Xiaorong Gao

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Citations (Scopus)

Abstract

The recognition mechanism of alpha-band oscillation for background EEG was analyzed during speech recognition under the auditory-only (A), audio-visual (AV) and visual-only (V) conditions. EEG signals for 20 university volunteers were measured at the SNRs of 0, -4, -8, -12 and -16 dB under the A, AV and V conditions. It was indicated that the task-relevant brain areas exhibited ERS under the different three sensory conditions. Brain region of A condition was distributed in the regions of frontal, central, and parietal, whereas those of AV and V conditions were concentrated in the parietal areas. Larger alpha-band power (ERS) of A condition was observed than those of AV and V conditions. The background brightness, objects recognition, relevant-task, and lip movement might contribute to the ERS. It was revealed that alpha-band oscillation can reflect the ability to process the background information for the human brain.

Original languageEnglish
Title of host publicationProceedings - 2015 8th International Conference on BioMedical Engineering and Informatics, BMEI 2015
EditorsZhiyong Tao, Li Bai, Sen Lin, Jinguang Sun, Lipo Wang, Liangshan Shao
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages153-157
Number of pages5
ISBN (Electronic)9781509000227
DOIs
Publication statusPublished - 8 Feb 2016
Event8th International Conference on BioMedical Engineering and Informatics, BMEI 2015 - Shenyang, China
Duration: 14 Oct 201516 Oct 2015

Publication series

NameProceedings - 2015 8th International Conference on BioMedical Engineering and Informatics, BMEI 2015

Conference

Conference8th International Conference on BioMedical Engineering and Informatics, BMEI 2015
Country/TerritoryChina
CityShenyang
Period14/10/1516/10/15

Keywords

  • EEG
  • ERS
  • Speech recognition
  • alpha
  • audio-visual

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