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- Väljamäe, Alexander, 1978
(författare)
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Self-motion and Presence in the Perceptual Optimization of a Multisensory Virtual Reality Environment
- 2005
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Determining the perceptually optimal resolution of multisensory renderingmight help to foster the development of cost-effective, highly immersivemulti-modal displays for mediated environments (e.g. virtual and augmentedreality). The required sensory depth of stimulation can be quantified usinghuman centered methodologies where end user experiences serve as a basis foruni- and cross-modal optimization of the sensory inputs. In the psychophysicalstudies presented in this thesis, self-reported presence and illusoryself-motion (vection) indicated salience of auditory and multisensory cues indesign of perceptually optimized motion simulators.Contribution of auditory cues to illusory self-motion has been largelyneglected until very recently and papers A and B present studies on purelyauditory induced vection (AIV). Paper A shows that rotating auditory scenessynthesized using individualized Head-Related Transfer Functions (HRTFs) aremore instrumental for presence compared to generic binaural synthesis. Study ontranslational AIV in paper B shows that inconsistent auditory scene mightsignificantly decrease self-motion responses. Paper C and D demonstrate thatbi-sensory stimulations increase presence and self-motion ratings as expected.In paper C additional vibrotactile stimulation increased translational AIV andpresence ratings, especially for the stimuli containing the auditory-tactileengine metaphor. Paper D extended paper A results for rotational AIV showingthat spatial resolution of rotating auditory scenes can be greatly reduced whencombined with visual input.This thesis shows that sound plays important role in the illusory self-motionperception and it should be carefully used in multi-modal motion simulators. Thepresented findings suggest that a minimum set of acoustic cues can be sufficientfor eliciting a self-motion sensation, especially if other modalities areinvolved. However, perceptual consistency of the created auditory and multimodalscenes should be assured in the design of the next generation of motionsimulators.
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| 2. |
- Väljamäe, Alexander, 1978, et al.
(författare)
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Travelling without moving: Auditory scene cues for translational self-motion
- 2005
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Ingår i: Proceedings of International Conference on Auditory Display.
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Tidskriftsartikel (refereegranskat)abstract
- Creating a sense of illusory self-motion is crucial for many Virtual Reality applications and the auditory modality is an essential, but often neglected, component for such stimulations. In this paper, perceptual optimization of auditory-induced, translational self-motion (vection) simulation is studied using binaurally synthesized and reproduced sound fields. The results suggest that auditory scene consistency and ecologically validity makes a minimum set of acoustic cues sufficient for eliciting auditory-induced vection. Specifically, it was found that a focused attention task and sound objects motion characteristics (approaching or receding) play an important role in self-motion perception. In addition, stronger sensations for auditory induced self-translation than for previously investigated self-rotation also suggest a strong ecological validity bias, as translation is the most common movement direction.
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