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Related Experiment Videos

Illusory changes in a sound source and outflow theory

K B Hoyenga, B Wallace

    The Journal of General Psychology
    |October 1, 1982
    PubMed
    Summary
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    Auditory illusions of sound movement decreased when sound intensity increased, especially when participants could move their heads. This suggests intensity acts as a cue to reduce perceived auditory motion.

    Area of Science:

    • Auditory perception
    • Psychoacoustics
    • Human factors

    Background:

    • Illusory movement, or autokinetic effects, can occur with auditory stimuli.
    • Understanding factors influencing auditory localization is crucial for various applications.

    Purpose of the Study:

    • To investigate the influence of sound intensity and frequency on illusory sound source movement.
    • To examine the role of head mobility in the perception of auditory motion illusions.

    Main Methods:

    • Two experiments were conducted with 220 participants.
    • Sound intensity (10-60 dB SPL) and frequency (1000-5000 Hz) were manipulated.
    • Participant head position was either stabilized or free to move.

    Main Results:

    Related Experiment Videos

    • When head position was fixed, sound intensity did not affect illusory direction changes.
    • With free head movement, increasing sound intensity significantly reduced illusory direction changes.
    • Illusory intensity changes were also perceived and reduced by increased sound intensity.

    Conclusions:

    • Sound intensity can modulate the perception of auditory motion illusions, particularly when head movements are allowed.
    • Findings support an error signal and noise model for autokinetic effects in auditory perception.
    • Results have implications for understanding auditory localization and sound source movement perception.