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Related Experiment Videos

Comodulation masking release in a forward-masking paradigm.

D McFadden1, B A Wright

  • 1Department of Psychology, University of Texas, Austin 78712.

The Journal of the Acoustical Society of America
|November 1, 1987
PubMed
Summary
This summary is machine-generated.

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Listeners can better detect signals using correlated masker and cue bands, demonstrating improved temporal masking perception. This suggests listeners gain more information from temporally aligned auditory cues.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Signal processing

Background:

  • Comodulation masking release (CMR) is a phenomenon where signal detectability improves with masker comodulation.
  • Forward-masking procedures are used to investigate auditory temporal processing.
  • Lateral suppression can influence signal detection in the presence of masking noise.

Purpose of the Study:

  • To investigate the role of temporal envelope correlation between masker and cue bands on signal detectability.
  • To examine the influence of contralateral noise on CMR-like effects.
  • To understand how listeners utilize temporal information in auditory masking.

Main Methods:

  • A forward-masking paradigm was employed using a tonal signal and a noise masker.

Related Experiment Videos

  • Cue bands with correlated or uncorrelated temporal envelopes were presented with the masker.
  • Signal detectability was measured under different conditions, including the addition of contralateral noise.

    • Main Results:

    • Signal detectability was enhanced by the presence of cue bands, consistent with lateral suppression.
    • A significant improvement in signal detectability (approx. 3 dB) was observed in the correlated condition compared to the uncorrelated condition.
    • Contralateral noise reduced the difference between correlated and uncorrelated conditions, suggesting a contribution of "confusion effects".

    Conclusions:

    • The temporal envelope correlation between masker and cue bands influences auditory signal detection.
    • Listeners can extract more temporal information from correlated auditory cues.
    • Confusion effects play a role in temporal masking, and can be mitigated by contralateral noise presentation.