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Related Experiment Videos

The precedence effect.

H Gaskell

    Hearing Research
    |December 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    The precedence effect explains how we perceive a single sound from the first sound

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    Area of Science:

    • Auditory Perception
    • Psychoacoustics
    • Acoustics

    Background:

    • The precedence effect describes the perception of a single sound when two similar transient sounds are presented binaurally in quick succession.
    • Perceived sound location is primarily determined by the initial sound cues reaching the ears.

    Purpose of the Study:

    • To investigate the classical precedence effect (relying on interaural delays) and the amplitude-based precedence effect (relying on interaural amplitude differences).
    • To analyze anomalous results observed in amplitude-based precedence effect experiments.
    • To examine the role of spectral characteristics in both precedence effect types.

    Main Methods:

    • Utilized stimuli consisting of 20 microsecond (mus) pulses presented binaurally via earphones.

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  • Conducted experiments on both classical and amplitude-based precedence effects.
  • Analyzed the spectral characteristics (amplitude and phase) of the stimuli.

    • Main Results:

    • Observed unexpected but consistent anomalous results in amplitude-based precedence effect experiments.
    • Found that for delays of 600 mus or less, auditory localization is simply related to the amplitude and phase spectra of the stimuli.
    • Demonstrated the influence of spectral characteristics on sound localization in both classical and amplitude-based precedence effects.

    Conclusions:

    • Auditory perception of sound location under the precedence effect is strongly influenced by spectral properties of the sound.
    • The relationship between spectral characteristics and perceived location holds for delays up to 600 mus.
    • Further research is needed to fully understand the anomalous results in amplitude-based precedence effects.