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Related Experiment Videos

Grouping in pitch perception: evidence for sequential constraints

C J Darwin1, R W Hukin, B Y al-Khatib

  • 1University of Sussex, Brighton, England.

The Journal of the Acoustical Society of America
|August 1, 1995
PubMed
Summary

Sequential auditory grouping influences pitch perception. Preceding tones reduce pitch changes from mistuned harmonics, suggesting grouping mechanisms are key to how we perceive pitch.

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Area of Science:

  • Auditory Perception
  • Psychoacoustics
  • Pitch Perception

Background:

  • Understanding auditory grouping is crucial for explaining pitch perception.
  • Previous research suggests sequential processing plays a role in auditory scene analysis.

Purpose of the Study:

  • To investigate the role of sequential auditory grouping constraints in pitch perception.
  • To examine how preceding tones affect the perception of mistuned harmonics within complex tones.

Main Methods:

  • Experiment 1: Presented a mistuned harmonic within a complex tone preceded by a sequence of tones at the mistuned frequency.
  • Experiment 2: Manipulated the level of the mistuned harmonic, testing both ipsilateral and contralateral presentation.
  • Measured the perceived pitch changes resulting from harmonic mistuning under different sequential and presentation conditions.

Main Results:

  • A preceding sequence of tones significantly reduced perceived pitch changes caused by mistuning.
  • This pitch change reduction persisted even when components were presented contralaterally.
  • Reducing the mistuned component's level decreased pitch change size only with ipsilateral presentation.

Conclusions:

  • Sequential auditory grouping mechanisms are integral to pitch perception.
  • Results challenge the significant role of peripheral adaptation in auditory grouping for pitch.
  • Central auditory processing likely underlies the observed sequential grouping effects on pitch.

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