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Doppler Illusion Prevails Over Pratt Effect in Risset Tones.
Julián Villegas1, Naoki Fukasawa1
1University of Aizu, Aizu-Wakamatsu, Japan.
Perception
|November 8, 2018
Summary
Risset tones reveal auditory motion perception. Upward glissandi suggest approach, downward suggest receding, with the Doppler illusion stronger than the Pratt effect for simulated sounds.
Area of Science:
- Auditory perception
- Psychoacoustics
- Auditory motion
Background:
- Frequency changes in Risset tones link to sound source motion.
- The Pratt effect relates to vertical motion, Doppler illusion to horizontal motion.
Purpose of the Study:
- Investigate auditory motion perception of Risset tones.
- Compare the strength of the Pratt effect and Doppler illusion.
Main Methods:
- Presented unspatialized and simulated Risset tones (sagittal/coronal planes).
- Monotic and diotic presentation with varying spatialization techniques.
- Assessed perceived origin and motion direction.
Main Results:
- Upward glissandi perceived as approaching, downward as receding.
- Horizontal motion perception stronger in sagittal than coronal plane simulations.
- Doppler illusion appears stronger than Pratt effect for sagittal plane Risset tones.
Conclusions:
- Auditory motion perception is influenced by frequency changes in Risset tones.
- The Doppler illusion may dominate over the Pratt effect in specific headphone simulations.
- Findings enhance understanding of auditory motion cues and frequency variations.
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