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Related Experiment Videos

Dynamic processes in the precedence effect.

R L Freyman1, R K Clifton, R Y Litovsky

  • 1Department of Communication Disorders, University of Massachusetts, Amherst 01003.

The Journal of the Acoustical Society of America
|August 1, 1991
PubMed
Summary
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Prior auditory stimulation significantly reduces echo perception. Increasing the number of conditioning clicks enhances echo suppression, demonstrating a key mechanism in auditory processing.

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Sensory Perception

Background:

  • Echo perception is a fundamental aspect of auditory processing.
  • Understanding factors influencing echo detection is crucial for auditory models.
  • Previous research suggests pre-stimulus auditory input can modulate perception.

Purpose of the Study:

  • To investigate how preceding auditory stimulation affects echo suppression.
  • To determine the relationship between conditioning stimulus properties and echo threshold.
  • To elucidate the roles of lead and lag stimuli in echo suppression.

Main Methods:

  • Three experiments using an anechoic chamber with two loudspeakers (lead and lag sounds).
  • Subjects reported echo perception during test click pairs following conditioning stimuli.

Related Experiment Videos

  • Objective measurement of echo threshold using a standardized procedure.

    • Main Results:

    • Preceding conditioning clicks significantly diminished lagging sound perception in most listeners.
    • Echo threshold increased with the number of conditioning clicks (3-17).
    • Suppression was independent of click rate and conditioning train duration; both lead and lag stimuli were necessary for suppression buildup.

    Conclusions:

    • Auditory stimulation preceding a test sound can induce significant echo suppression.
    • The magnitude of echo suppression is dependent on the number of conditioning stimuli.
    • Both lead and lag stimuli contribute to the development of echo suppression.