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Predicting perceptual boundaries in auditory streaming using delay differential equations.

Asim Alawfi1,2, Farzaneh Darki2, Jan Sieber2

  • 1Department of Mathematics and Statistics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11566, Saudi Arabia.

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Summary
This summary is machine-generated.

Auditory streaming organizes sounds by modeling neural populations. This study reveals that perceptual boundaries are sensitive to neural thresholds, proposing a variable-threshold approach for better accuracy in auditory perception.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Auditory Perception

Background:

  • Auditory streaming organizes complex soundscapes into distinct sources.
  • Perceptual boundaries and bistability are key to understanding auditory organization.
  • Neural models are crucial for investigating the mechanisms of auditory perception.

Purpose of the Study:

  • To model auditory streaming using coupled neural populations.
  • To investigate the relationship between neural thresholds and perceptual boundaries.
  • To explore how symmetry-breaking bifurcations govern auditory perception transitions.

Main Methods:

  • Developed a computational model with excitatory and inhibitory neural populations.
  • Simulated a two-tone auditory stream with delayed cross-inhibition.
  • Analyzed perception boundaries in relation to neural thresholds and bifurcations.

Main Results:

  • Perceptual boundaries are highly sensitive to neural threshold choices.
  • Symmetry-breaking bifurcations govern transitions between auditory perceptions.
  • A variable-threshold criterion, based on neural response amplitude, improves boundary accuracy.

Conclusions:

  • Neural thresholds play a critical role in auditory perception boundaries.
  • Fixed thresholds are insufficient; variable thresholds offer a more refined approach.
  • Stimulus parameters significantly shape auditory perceptual organization.