Cross-phaseogram: Objective neural index of speech sound differentiation

Erika Skoe*, Trent Nicol, Nina Kraus

*Corresponding author for this work

Research output: Contribution to journalArticle

39 Scopus citations

Abstract

We introduce a new approach, the cross-phaseogram, that captures the brain's ability to discriminate between spectrotemporally dynamic speech sounds, such as stop consonants. The goal was to develop an analysis technique for auditory brainstem responses (ABRs) that taps into the sub-millisecond temporal precision of the response but does not rely on subjective identification of individual response peaks. Using the cross-phaseogram technique, we show that time-varying frequency differences in speech stimuli manifest as phase differences in ABRs. By applying this automated and objective technique to a large dataset, we found these phase differences to be less pronounced in children who perform below average on a standardized test of listening to speech in noise. We discuss the theoretical and practical implications of our results, and the extension of the cross-phaseogram method to a wider range of stimuli and populations.

Original languageEnglish (US)
Pages (from-to)308-317
Number of pages10
JournalJournal of Neuroscience Methods
Volume196
Issue number2
DOIs
StatePublished - Mar 30 2011

Keywords

  • Auditory brainstem response
  • Phase
  • Speech
  • Speech-in-noise perception
  • Subcortical

ASJC Scopus subject areas

  • Neuroscience(all)

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