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Area of Science:

  • Auditory Perception
  • Virtual Acoustics
  • Psychoacoustics

Background:

  • Virtual auditory environments rely on acoustic cues for spatial perception.
  • Understanding how listeners perceive distance in virtual spaces is crucial for immersive technologies.

Purpose of the Study:

  • To investigate the role of temporal, spectral, and binaural room cues in virtual auditory distance perception.
  • To identify which acoustic cues are most influential in estimating sound source distance.

Main Methods:

  • Listeners judged perceived distance of frontal sound sources (0.5-10m) in a virtual room via headphones.
  • Stimuli were equalized in broadband received level, using pink noise, white noise, or speech signals.
  • Analysis focused on direct-to-reverberant ratio (DRR) and spectral balance as potential distance cues.

Main Results:

  • Distance estimates showed similar patterns across different source signals.
  • Direct-to-reverberant ratio (DRR) and spectral balance were identified as key cues for distance perception.
  • A bias in distance estimates was observed: pink noise (farthest), speech (closer), white noise (closest).
  • DRR demonstrated the highest correlation with perceived distance estimates.

Conclusions:

  • Listeners utilize multiple acoustic cues, with DRR and spectral balance being significant for virtual auditory distance perception.
  • While DRR and spectral balance explain some source-specific biases, differences between speech and noise remain less accounted for.
  • The direct-to-reverberant ratio (DRR) emerges as a primary cue for virtual auditory distance estimation.