Relationship between N1 evoked potential morphology and the perception of voicing

A. Sharma, C. M. Marsh, Michael Dorman

    Research output: Contribution to journalArticle

    69 Citations (Scopus)

    Abstract

    Auditory evoked potential (AEP) correlates of the neural representation of stimuli along a /ga/-/ka/ and a /ba/-/pa/ continuum were examined to determine whether the voice-onset time (VOT)-related change in the N1 onset response from a single to double-peaked component is a reliable indicator of the perception of voiced and voiceless sounds. Behavioral identification results from ten subjects revealed a mean category boundary at a VOT of 46 ms for the /ga/-/ka/ continuum and at a VOT of 27.5 ms for the /ba/-/pa/ continuum. In the same subjects, electrophysiologic recordings revealed that a single N1 component was seen for stimuli with VOTs of 30 ms and less, and two components (N1' and N1) were seen for stimuli with VOTs of 40 ms and more for both continua. That is, the change in N1 morphology (from single to double-peaked) coincided with the change in perception from voiced to voiceless for stimuli from the /ba/-/pa/ continuum, but not for stimuli from the /ga/-/ka/ continuum. The results of this study show that N1 morphology does not reliably predict phonetic identification of stimuli varying in VOT. These findings also suggest that the previously reported appearance of a 'double-peak' onset response in aggregate recordings from the auditory cortex does not indicate a cortical correlate of the perception of voicelessness. (C) 2000 Acoustical Society of America.

    Original languageEnglish (US)
    Pages (from-to)3030-3035
    Number of pages6
    JournalJournal of the Acoustical Society of America
    Volume108
    Issue number6
    DOIs
    StatePublished - 2000

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    stimuli
    continuums
    recording
    phonetics
    cortexes
    Evoked Potentials
    Stimulus
    Voicing
    acoustics
    Voice Onset Time
    Onset

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

    Cite this

    Relationship between N1 evoked potential morphology and the perception of voicing. / Sharma, A.; Marsh, C. M.; Dorman, Michael.

    In: Journal of the Acoustical Society of America, Vol. 108, No. 6, 2000, p. 3030-3035.

    Research output: Contribution to journalArticle

    Sharma, A. ; Marsh, C. M. ; Dorman, Michael. / Relationship between N1 evoked potential morphology and the perception of voicing. In: Journal of the Acoustical Society of America. 2000 ; Vol. 108, No. 6. pp. 3030-3035.
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