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Related Experiment Video

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A Two-interval Forced-choice Task for Multisensory Comparisons

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Published on: November 9, 2018

Subjectively divided tone components in the gap transfer illusion.

Kyoko Kanafuka¹, Yoshitaka Nakajima, Gerard B Remijn

¹Nippon Telegraph and Telephone West Corporation, Osaka, Japan.

Perception & Psychophysics

|October 13, 2007

Summary

The gap transfer illusion occurs when a gap in a long sound is perceived in a shorter sound instead. This study found illusory tones arise from integrating sound onsets and offsets, not other acoustic factors.

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Area of Science:

Auditory perception
Psychoacoustics
Cognitive science

Background:

The gap transfer illusion describes a phenomenon where a temporal gap is mislocalized.
Previous explanations involving acoustic properties have been insufficient.

Purpose of the Study:

To investigate the perceptual mechanisms underlying the gap transfer illusion.
To test alternative explanations for the misperception of temporal gaps in auditory stimuli.

Main Methods:

Experiments involved presenting participants with gliding tones of varying durations and temporal gaps.
Points of subjective equality for pitch and duration were determined for tones within the perceived gap.
Explanations based on envelope patterns, combination tones, and acoustic beats were evaluated.

Main Results:

The gap transfer illusion was not explained by envelope patterns, combination tones, or acoustic beats.
Perceptual integration of sound onsets and offsets of acoustically distinct sounds was found to be a viable explanation.
Subjective equality points indicated a specific perceptual mechanism at play.

Conclusions:

The gap transfer illusion is likely mediated by the perceptual integration of auditory event boundaries.
This finding has implications for understanding how the brain constructs auditory scenes.
Auditory event perception relies on integrating discrete acoustic features rather than solely on continuous acoustic properties.