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Related Experiment Videos

Bimodal cues for speech loudness.

R D Glave, A C Rietveld

    The Journal of the Acoustical Society of America
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    This study explored speech loudness using audio-visual cues. While acoustic signals remain dominant, visual cues significantly influence perceived loudness, especially when synchronized with audio effort cues.

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    Is the effort dependence of speech loudness explicable on the basis of acoustical cues?

    The Journal of the Acoustical Society of America·1975

    Area of Science:

    • Speech science
    • Auditory perception
    • Visual perception

    Background:

    • Speech loudness is primarily studied through acoustic analysis.
    • The influence of visual cues on speech perception is increasingly recognized.

    Purpose of the Study:

    • To investigate the bimodal (audio-visual) perception of speech loudness.
    • To determine the relative contributions of acoustic and visual stimuli to perceived loudness.
    • To examine how synchronized effort cues in audio and visual modalities affect loudness perception.

    Main Methods:

    • Presentation of isolated acoustic stimuli (sustained vowels with 'effort' and 'noneffort' qualities).
    • Simultaneous presentation of acoustic stimuli with synchronous visual stimuli (speaker's face).
    • Subjective loudness judgments using the method of paired comparisons (law of comparative judgment).

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    Main Results:

    • Previous findings on effort-dependent speech loudness were confirmed.
    • Visual cues demonstrated a measurable effect on perceived speech loudness.
    • Acoustic cues were found to be dominant over visual cues.
    • Visual cues were most effective when synchronized with audio cues, particularly when effort varied in the same direction.

    Conclusions:

    • Speech loudness perception is influenced by both acoustic and visual information.
    • Synchronized audio-visual effort cues enhance the impact of visual information on loudness perception.
    • These findings suggest that speech loudness can be modulated by non-acoustic variables.