Breaking the silence: Exploring the influence of auditory singularity on visual search.

This article investigates the role of auditory stimulus singularity in the pip-and-pop effect, where auditory pure tones ("pips") enhance the visual detection of targets in dynamic search tasks. Using two eye-tracking experiments with different visual set sizes (24 and 48 items), the study compared no-sound, single-sound (singular auditory stimulus), and multiple-sound (non-singular auditory stimuli) conditions during target-detection tasks. Results showed that at low perceptual load (24 items), auditory stimuli did not significantly improve search efficiency, while at high perceptual load (48 items), both single- and multiple-sound conditions enhanced search speed and accuracy when the target was present. The findings suggest that auditory singularity alone is not necessary for the pip-and-pop effect; rather, the temporal alignment and integration of auditory and visual stimuli underlie the effect, emphasizing audiovisual interaction as a key mechanism in facilitating visual search.