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Temporal weighting in sound localization.

G Christopher Stecker1, Ervin R Hafter

  • 1Department of Psychology, University of California, Berkeley 94720, USA. cstecker@umich.edu

The Journal of the Acoustical Society of America
|September 24, 2002
PubMed
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Listeners" sound localization is influenced by the timing of clicks in a sound. Shorter intervals emphasize the first click, while gaps reset localization cues.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Computational neuroscience

Background:

  • Investigated sound localization dynamics using a free-field direct localization task.
  • Employed observer-weighting analysis to determine the influence of individual clicks in a train stimulus.
  • Examined the impact of interclick interval (ICI) and temporal gaps on localization accuracy.

Discussion:

  • Weighting functions demonstrated a stronger influence of the initial click at short interclick intervals (<5 ms), consistent with precedence effect and binaural adaptation.
  • For longer interclick intervals, all clicks contributed more equally to the listener's localization response.
  • Introduction of a temporal gap within a click train led to an increased influence of the click immediately following the gap, supporting the 'restarting' phenomenon.

Related Experiment Videos

Key Insights:

  • The temporal structure of sound, specifically interclick interval and gaps, significantly modulates the weighting of individual sound components for localization.
  • Early clicks in a rapid sequence dominate perceived sound source location.
  • Auditory system's ability to re-establish localization cues after a brief silence is demonstrated.

Outlook:

  • Further research can explore the neural mechanisms underlying this temporal weighting and gap detection.
  • Investigating individual differences in auditory processing and localization abilities.
  • Applications in designing more effective auditory displays and virtual reality environments.