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Discriminating coherence in spectro-temporal patterns

G Kidd1, C R Mason, H Dai

  • 1Department of Communication Disorders, Boston University, Massachusetts 02215, USA.

The Journal of the Acoustical Society of America
|June 1, 1995
PubMed
Summary
This summary is machine-generated.

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Listeners can better identify coherent spectral patterns when more tones are consistent. Discrimination improves with more consistent tones and bursts, but declines with frequency perturbations.

Area of Science:

  • Psychoacoustics
  • Auditory Perception
  • Signal Processing

Background:

  • Auditory perception involves distinguishing meaningful sounds from background noise.
  • Spectral patterns play a crucial role in sound identification and segregation.

Purpose of the Study:

  • To investigate trained listeners' ability to discriminate coherent frequency components within complex spectral patterns.
  • To determine factors influencing the perception of auditory patterns.

Main Methods:

  • Listeners discriminated between standard (random frequencies) and signal (partially coherent frequencies) multitone complexes.
  • Varying the number of coherent tones (n) and total tones (m) was tested.
  • The effect of frequency perturbations on coherent components was assessed.

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Main Results:

  • Discrimination accuracy increased with a higher ratio of coherent to total tones (n/m).
  • Increased number of bursts per interval also improved discrimination.
  • Discrimination performance decreased as coherent components' frequencies were perturbed.

Conclusions:

  • Listeners can effectively identify coherent spectral patterns based on consistent frequency components.
  • The ratio of coherent to total tones is a key factor in pattern discrimination.
  • A multichannel filtering model can explain the observed results in auditory perception.