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Related Experiment Videos

Binaural coherence edge pitch.

W M Hartmann1, C D McMillon

  • 1Department of Physics and Astronomy, Michigan State University, East Lansing 48824, USA. hartmann@pa.msu.edu

The Journal of the Acoustical Society of America
|February 24, 2001
PubMed
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The binaural coherence edge pitch (BICEP) is a novel auditory phenomenon. This pitch effect, generated by specific interaural phase differences in noise, challenges existing models of binaural hearing.

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Signal Processing

Background:

  • Binaural pitch effects, like binaural edge pitch (BEP), are crucial for understanding auditory perception.
  • The binaural coherence edge pitch (BICEP) is a related dichotic pitch phenomenon.
  • Investigating BICEP provides insights into how the brain processes complex auditory cues.

Purpose of the Study:

  • To investigate the characteristics and perceptual boundaries of the binaural coherence edge pitch (BICEP).
  • To compare BICEP properties with existing models of binaural pitch perception.
  • To determine the influence of stimulus parameters on BICEP salience and matching.

Main Methods:

  • Stimuli generation using spectrally dense sine wave components with controlled interaural phase relationships.

Related Experiment Videos

  • Pitch-matching experiments to quantify the perceived pitch of the BICEP.
  • Systematic variation of coherence edge frequency, interaural phase, and component amplitude distributions.

    • Main Results:

    • BICEP is perceivable for edge frequencies between 300-1000 Hz, matched by a frequency 5-10% higher.
    • The matching frequency is on the incoherent side of the spectral edge, aligning with some binaural models.
    • BICEP is robust to amplitude variations and moderate interaural delays but shows dependency on interaural phase for some listeners.

    Conclusions:

    • The BICEP is a distinct binaural pitch phenomenon with specific perceptual ranges.
    • Existing binaural pitch models partially explain BICEP but do not fully account for all observed features.
    • BICEP's characteristics, particularly its dependence on phase coherence, present a significant challenge for current auditory models.