Auditory Stream Segregation by Musical Timbre - Effects of Static and Dynamic Acoustic Attributes

Journal/Book: J Exp Psychol-Hum Percep Perf. 1995; 21: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 751-763.

Abstract: Two experiments examined the influence of timbre on auditory stream segregation. In Experiment 1, listeners heard sequences of orchestral tones equated for pitch and loudness, and they rated how strongly the instruments segregated. Multidimensional scaling analyses of these ratings revealed that segregation was based on the static and dynamic acoustic attributes that influenced similarity judgments in a previous experiment (P. Iverson & C.L. Krumhansl, 1993). In Experiment 2, listeners heard interleaved melodies and tried to recognize the melodies played by a target timbre. The results extended the findings of Experiment 1 to tones varying in pitch. Auditory stream segregation appears to be influenced by gross differences in static spectra and by dynamic attributes, including attack duration and spectral flux. These findings support a Gestalt explanation of stream segregation and provide evidence against a peripheral channel model.

Note: Article P Iverson, Univ Washington, Dept Speech & Hearing Sci, Box 357920, Seattle, WA 98195 USA

Keyword(s): INTERLEAVED MELODIES; TONES; PERCEPTION; PITCH; SEQUENCES; TIME; Time Factors. Acoustics ; Music ; Pitch Perception. Human

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