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Lateral-position-based models of interaural discrimination.

R M Stern, H S Colburn

    The Journal of the Acoustical Society of America
    |February 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

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    Lateral position is the primary cue in binaural discrimination experiments. However, other perceptual cues can improve performance when position information is limited, suggesting a more complex auditory processing model.

    Area of Science:

    • Auditory Neuroscience
    • Psychoacoustics
    • Binaural Hearing

    Background:

    • Interaural discrimination experiments investigate how humans perceive sound location.
    • The role of lateral position as the sole cue in these experiments is debated.
    • Existing models often assume optimal processing of subjective lateral position.

    Purpose of the Study:

    • To test the hypothesis that lateral position is the only cue in binaural discrimination.
    • To compare experimental data with predictions from the "position-variable" model of binaural interaction.
    • To explore the utility of secondary perceptual cues when position information is degraded.

    Main Methods:

    • Investigated human psychoacoustic performance with 500-Hz auditory stimuli.
    • Compared experimental results to the "position-variable" model's predictions for subjective laterality.

    Related Experiment Videos

  • Designed experiments to eliminate or reduce the effectiveness of the lateral position cue.

    • Main Results:

    • The "position-variable" model qualitatively describes much of the experimental data.
    • Observed discrimination performance significantly exceeded model predictions in specific experimental conditions.
    • These conditions involved experiments where the utility of the position cue was experimentally minimized.

    Conclusions:

    • Lateral position changes are the dominant cue in most interaural discrimination tasks.
    • Secondary attributes of perceptual images become important when position-based performance is insufficient.
    • Findings suggest that auditory systems utilize multiple cues for accurate sound localization.