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Forward masking by enhanced components in harmonic complexes

N F Viemeister, S P Bacon

    The Journal of the Acoustical Society of America
    |June 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    Exposure to a spectral complex can enhance target component perception by increasing sensitivity in unadapted frequency regions. This suggests an adaptive gain increase, potentially reducing neural suppression.

    Area of Science:

    • Auditory perception
    • Psychoacoustics
    • Sensory adaptation

    Background:

    • Spectral complexes contain multiple frequency components.
    • Auditory adaptation can alter frequency sensitivity.
    • The "enhancement effect" describes increased target component perception.

    Purpose of the Study:

    • To investigate the underlying mechanisms of the "enhancement effect" in auditory perception.
    • To determine if the enhancement effect involves changes in neural gain.
    • To explore the role of suppression in auditory adaptation.

    Main Methods:

    • Participants listened to harmonic complexes with and without a target component.
    • Forward masking of a sinusoidal probe was measured.
    • Perceptual sensitivity to the target component was assessed.

    Related Experiment Videos

    Main Results:

    • An enhanced target component produced greater forward masking than a non-enhanced component.
    • Enhanced components behaved as if they were physically more intense.
    • The results suggest an increase in gain in unadapted frequency regions.

    Conclusions:

    • The "enhancement effect" likely results from an increase in neural gain.
    • This gain increase may stem from reduced suppression in unadapted frequency regions.
    • Frequency-specific adaptation plays a crucial role in auditory perception.