Physiological evidence for auditory modulation filterbanks: Cortical responses to concurrent modulations

Juanjuan Xiang, David Poeppel, Jonathan Z. Simon

Research output: Contribution to journalArticle

Abstract

Modern psychophysical models of auditory modulation processing suggest that concurrent auditory features with syllabic (∼5 Hz) and phonemic rates (∼20 Hz) are processed by different modulation filterbank elements, whereas features at similar modulation rates are processed together by a single element. The neurophysiology of concurrent modulation processing at speech-relevant rates is here investigated using magnetoencephalography. Results demonstrate expected neural responses to stimulus modulation frequencies; nonlinear interaction frequencies are also present, but, critically, only for nearby rates, analogous to "beating" in a cochlear filter. This provides direct physiological evidence for modulation filterbanks, allowing separate processing of concurrent syllabic and phonemic modulations.

Original languageEnglish (US)
Pages (from-to)EL7-EL12
JournalJournal of the Acoustical Society of America
Volume133
Issue number1
DOIs
StatePublished - Jan 1 2013

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ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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