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Contralateral and ipsilateral cueing in forward masking

B C Moore, B R Glasberg

    The Journal of the Acoustical Society of America
    |April 1, 1982
    PubMed
    Summary
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    Temporal cues significantly reduced signal detection thresholds in listeners, especially when synchronized with masker intervals. This suggests temporal uncertainty plays a key role in forward masking effects.

    Area of Science:

    • Auditory perception
    • Psychoacoustics

    Background:

    • Forward masking is a phenomenon where a masker precedes a signal, impacting detection.
    • Temporal uncertainty can influence auditory detection thresholds.

    Purpose of the Study:

    • To investigate the impact of temporal uncertainty on signal detection thresholds.
    • To examine the effect of noise and tonal cues on forward masking.

    Main Methods:

    • Measured signal detection thresholds for a 1-kHz tone in a 1-kHz narrow-band noise masker.
    • Introduced broadband noise cues or a 1.2-kHz tonal masker synchronously with signal or masker intervals.
    • Varied cue presentation ear (ipsilateral/contralateral).

    Main Results:

    • Signal thresholds were reduced by temporal cues in all conditions.

    Related Experiment Videos

  • The largest threshold reduction (approx. 20 dB) occurred when noise cues were synchronized with the masker.
  • A 1.2-kHz tonal masker produced a greater threshold reduction (10 dB) than the noise cue, likely due to suppression.

    • Conclusions:

    • Temporal uncertainty significantly impacts forward masking, especially when signal and masker characteristics are similar.
    • Temporal cues can mitigate forward masking effects, mimicking suppression.
    • Tonal maskers may induce stronger suppression effects than broadband noise cues.