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Categorization of Extremely Brief Auditory Stimuli: Domain-Specific or Domain-General Processes?

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  • Emmanuel Bigand
  • Charles Delbé
  • Yannick Gérard
  • Barbara Tillmann

Abstract

The present study investigated the minimum amount of auditory stimulation that allows differentiation of spoken voices, instrumental music, and environmental sounds. Three new findings were reported. 1) All stimuli were categorized above chance level with 50 ms-segments. 2) When a peak-level normalization was applied, music and voices started to be accurately categorized with 20 ms-segments. When the root-mean-square (RMS) energy of the stimuli was equalized, voice stimuli were better recognized than music and environmental sounds. 3) Further psychoacoustical analyses suggest that the categorization of extremely brief auditory stimuli depends on the variability of their spectral envelope in the used set. These last two findings challenge the interpretation of the voice superiority effect reported in previously published studies and propose a more parsimonious interpretation in terms of an emerging property of auditory categorization processes.

Suggested Citation

  • Emmanuel Bigand & Charles Delbé & Yannick Gérard & Barbara Tillmann, 2011. "Categorization of Extremely Brief Auditory Stimuli: Domain-Specific or Domain-General Processes?," PLOS ONE, Public Library of Science, vol. 6(10), pages 1-6, October.
    • Handle: RePEc:plo:pone00:0027024
    DOI: 10.1371/journal.pone.0027024
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    References listed on IDEAS

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    1. Pascal Belin & Robert J. Zatorre & Philippe Lafaille & Pierre Ahad & Bruce Pike, 2000. "Voice-selective areas in human auditory cortex," Nature, Nature, vol. 403(6767), pages 309-312, January.
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