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Related Concept Videos

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Perceptual learning of modulation filtered speech.

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  • 1School of Psychology, University of Sussex.

Journal of Experimental Psychology. Human Perception and Performance
|January 23, 2025
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Summary
This summary is machine-generated.

Human listeners adapt to distorted speech by adjusting representations of acoustic modulations. This perceptual learning is specific to trained modulations but can generalize to new talkers with specific cues.

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Area of Science:

  • Auditory Neuroscience
  • Speech Perception
  • Psychoacoustics

Background:

  • Human listeners exhibit significant adaptability to degraded speech signals.
  • Previous research suggests perceptual learning involves changes in sublexical representations, but their exact nature remains unclear.

Purpose of the Study:

  • To investigate if perceptual learning of degraded speech involves changes in representations tuned to acoustic modulations.
  • To explore the role of talker-specific cues in the generalization of this learning to novel talkers.

Main Methods:

  • Systematic filtering of speech to control acoustic modulation content during training and testing.
  • Utilizing modulation filtering and varied feedback (clear speech vs. written) to assess cross-talker generalization.

Main Results:

  • Perceptual learning demonstrated high specificity to the modulation filter used during training.
  • Learning showed partial generalization to speech from untrained talkers.
  • Talker-specific cues were found to enhance this generalization.

Conclusions:

  • Perceptual learning of degraded speech involves adjustments to internal models mapping acoustic features to phonological categories.
  • These models can adapt to novel talkers, especially when listener accounts for acoustic variability.