Speech comprehension assessed by electroencephalography with m-sequence technique

H. Takeichi, S. Koyama, A. Matani, A. Cichocki

Research output: Contribution to journalArticlepeer-review


Electroencephalograms (EEGs) were recorded from eight Japanese speakers while they listened to Japanese and Spanish sentences (approximately 51 s each). The sentences were modulated in amplitude by a binary m-sequence and played forward or backward. A circular cross-correlation function was computed between the EEG signals and the m-sequence and averaged across subjects. Independent component analysis of the averaged function revealed a component source response which was obtained only for the comprehensible Japanese and not for the incomprehensible sentences. The present study has thus shown that a one-minute-long EEG signal is sufficient for the assessment of speech comprehension.

Original languageEnglish
Pages (from-to)83-86
Number of pages4
JournalInternational Congress Series
Publication statusPublished - Jul 2007
Externally publishedYes


  • Brain computer interface
  • Cross-correlation function
  • Independent component analysis
  • Language
  • N400
  • Natural continuous speech


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