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Updated: May 29, 2026
07:13
A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
Perceived tonal continuity through two noise bursts separated by silence.
Nicholas R Haywood1, I-Chu Julie Chang, Valter Ciocca
1School of Audiology and Speech Sciences, University of British Columbia, Vancouver, V6T 1Z3, Canada. nhaywood@audiospeech.ubc.ca
The Journal of the Acoustical Society of America
|September 8, 2011
Summary
Listeners perceived illusory continuity of pure tone flankers through a silent gap, demonstrating that auditory perception can bridge silence. This auditory illusion impacts sound continuity perception.
Area of Science:
- Auditory perception
- Psychoacoustics
- Signal processing
Background:
- The perception of auditory continuity is crucial for understanding speech and music.
- Illusory continuity can occur when auditory events are bridged by silence or masking noise.
Purpose of the Study:
- To investigate the perceived continuity of pure tone flankers through a masker containing silence.
- To determine if illusory continuity affects auditory masking and perceptual grouping.
Main Methods:
- Three experiments utilized a two-interval, two-alternative forced-choice (2I-2AFC) procedure and direct listener ratings.
- Stimuli included pure tone flankers presented with a silent gap within a masker.
- Frequency-glided flankers with aligned and misaligned trajectories were tested.
Main Results:
- Discrimination accuracy was impaired when flankers were present during the silent gap, suggesting illusory continuity.
- Performance improved when flanker trajectories were misaligned, indicating sensitivity to onset/offset grouping.
- Listeners directly reported strong continuity in silent gap conditions, correlating with performance impairments.
Conclusions:
- Auditory continuity can be perceived through silence, even when physical masking is absent.
- Perceptual grouping of flanker onsets and offsets plays a key role in illusory continuity.
- These findings challenge traditional masking models and highlight the active nature of auditory perception.
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