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[Intermodal timing cues for audio-visual speech recognition].

Masahiro Hashimoto1, Masaharu Kumashiro

  • 1Bio-information Research Center, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu 807-8555, Japan.

Journal of UOEH
|July 13, 2004
PubMed
Summary

Lip-reading advantage for Japanese young adults persists with audio delays up to 120 ms. Speech information is integrated syllabically, suggesting benefits in noisy environments.

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Human-Computer Interaction

Context:

  • Investigating the temporal limits of audio-visual speech integration.
  • Examining lip-reading effectiveness in Japanese young adults.
  • Utilizing controlled audio delays to desynchronize speech information.

Purpose:

  • To determine the maximum audio delay that preserves lip-reading benefits.
  • To understand the temporal scale of speech information integration.
  • To explore the impact of desynchronization on speech intelligibility.

Summary:

  • Audio-visual speech stimuli were presented to 16 young adults under varying audio delays (0-480 ms).
  • Speech intelligibility was significantly higher with delays under 120 ms compared to audio-alone.

Related Experiment Videos

  • A 120 ms delay, approximating mora duration, did not disrupt lip-reading advantage.

    • Impact:

    • Findings suggest audio-visual speech information is integrated on a syllabic timescale.
    • Lip-reading benefits are maintained for delays up to 120 ms.
    • Potential applications include enhancing communication in noisy workplaces.