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Related Experiment Video

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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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A method to identify noise-robust perceptual features: application for consonant /t/.

Marion S Régnier1, Jont B Allen

  • 1ECE Department and The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, 405 North Mathews, Urbana, Illinois 61801, USA.

The Journal of the Acoustical Society of America
|June 6, 2008
PubMed
Summary

This study links speech confusion patterns to acoustic features using the AI gram model. We found that cross-frequency timing explains consonant perception, particularly for /t/.

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Area of Science:

  • Speech perception research
  • Auditory neuroscience
  • Acoustic phonetics

Background:

  • Speech confusion patterns are influenced by the speech-to-noise ratio.
  • Acoustic features (AF) and perceptual events are key to understanding listener confusion.
  • The AI gram models articulation index density in the spectrotemporal domain.

Purpose of the Study:

  • To correlate speech confusion patterns with acoustic features using the AI gram model.
  • To identify the primary robust-to-noise feature of the consonant /t/.
  • To explain listener confusion by linking acoustic information to perceptual events.

Main Methods:

  • Collecting listener responses across various talkers and noise levels.
  • Utilizing AI gram models and confusion matrices to analyze speech data.
  • Examining spectrotemporal cues, specifically cross-frequency temporal coincidence, for consonant /t/.

Main Results:

  • A correlation was established between acoustic features (AF) and perceptual events via the AI gram model.
  • The consonant /t/ event is primarily defined by an across-frequency temporal coincidence.
  • This cross-frequency timing event is crucial for perceiving consonants in a vowel context.

Conclusions:

  • Cross-frequency timing coincidences form the fundamental element of auditory objects.
  • Neural circuits for binaural processing may be adapted for within-ear, across-channel coincidence detection.
  • The perception of the /t/ event relies on the audibility of the /t/ burst, not superthreshold properties.