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Some figural properties of auditory patterns

P L Divenyi, I J Hirsh

    The Journal of the Acoustical Society of America
    |November 1, 1978
    PubMed
    Summary
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    Listeners can identify musical patterns even when transposed, as long as intervals remain constant. Performance is best with consistent intervals and limited frequency ranges, especially when patterns are clear of background noise.

    Area of Science:

    • Auditory Perception
    • Psychoacoustics
    • Music Cognition

    Background:

    • Understanding how humans perceive musical patterns is crucial for fields like psychoacoustics and music cognition.
    • Previous research has explored pitch perception, but the specific role of frequency ratios and interval consistency in pattern identification requires further investigation.

    Purpose of the Study:

    • To investigate the impact of frequency transposition, interval variations, and frequency range on the identification of three-note musical patterns.
    • To determine how embedding these patterns within longer sequences affects listener performance.

    Main Methods:

    • Participants identified one of six permutations of three-note melodies presented with varying frequency transpositions and interval manipulations.
    • The study manipulated the frequency range of the patterns and the surrounding tones in embedded sequences.

    Related Experiment Videos

  • Listener performance was assessed under conditions of constant vs. unequal intervals and varying frequency spans.

    • Main Results:

    • High identification performance was maintained with transposition as long as musical intervals (frequency ratios) remained constant.
    • Identification remained good for frequency ranges up to approximately 1/3 octave, decreasing sharply with wider spans.
    • Performance degraded with unequal intervals and when patterns were embedded in longer sequences with overlapping frequencies.

    Conclusions:

    • Auditory pattern identification is robust to transposition if musical intervals are preserved.
    • The frequency range and consistency of intervals are critical factors in distinguishing musical patterns.
    • Perceptual grouping principles, akin to Gestalt theory, likely influence how listeners process musical sequences.