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Periodicity and pitch perception.

J R Pierce1

  • 1Center for Computer Research in Music and Acoustics, Stanford University, California 94305.

The Journal of the Acoustical Society of America
|October 1, 1991
PubMed
Summary
This summary is machine-generated.

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The periodicity mechanism, relying on tone burst repetition rate, can be the sole pitch determinant up to 250 bursts/sec. This rate is linked to auditory critical bandwidth, influencing pitch perception.

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics

Background:

  • Pitch perception is influenced by at least two mechanisms: harmonic resolution and temporal periodicity.
  • The role of the periodicity mechanism, especially with complex stimuli like tone bursts, requires further investigation.

Purpose of the Study:

  • To investigate the conditions under which the periodicity mechanism alone determines pitch.
  • To examine the relationship between critical rates, auditory critical bandwidth, and pitch perception.

Main Methods:

  • Utilized periodic patterns of equally spaced sinusoidal tone bursts.
  • Manipulated the phase of tone bursts (in-phase vs. 180-degree phase shift) and repetition rates.
  • Measured critical transitional rates and performed pitch matching experiments.

Related Experiment Videos

Main Results:

  • The periodicity mechanism can solely account for pitch perception up to repetition rates of 250 bursts per second for a 4978 Hz tone.
  • A critical transitional rate was observed, below which two stimuli with different fundamental frequencies and harmonic structures sounded identical.
  • Critical rates were found to be closely related to the auditory critical bandwidth.
  • Pitch matching data supported these findings, indicating rate-based pitch below the critical rate and fundamental frequency-based pitch above it.

Conclusions:

  • The temporal periodicity mechanism plays a significant role in pitch perception, particularly at high repetition rates.
  • Auditory critical bandwidth is a crucial factor influencing the transition between rate-based and frequency-based pitch mechanisms.
  • These findings contribute to a comprehensive understanding of auditory processing and pitch encoding.