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Detection of appearing and disappearing objects in complex acoustic scenes.

Cervantes Constantino, F; Pinggera, L; Paranamana, S; Kashino, M; Chait, M; (2012) Detection of appearing and disappearing objects in complex acoustic scenes. PLOS One , 7 (9) , Article e46167. 10.1371/journal.pone.0046167. Green open access

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Abstract

The ability to detect sudden changes in the environment is critical for survival. Hearing is hypothesized to play a major role in this process by serving as an "early warning device," rapidly directing attention to new events. Here, we investigate listeners' sensitivity to changes in complex acoustic scenes-what makes certain events "pop-out" and grab attention while others remain unnoticed? We use artificial "scenes" populated by multiple pure-tone components, each with a unique frequency and amplitude modulation rate. Importantly, these scenes lack semantic attributes, which may have confounded previous studies, thus allowing us to probe low-level processes involved in auditory change perception. Our results reveal a striking difference between "appear" and "disappear" events. Listeners are remarkably tuned to object appearance: change detection and identification performance are at ceiling; response times are short, with little effect of scene-size, suggesting a pop-out process. In contrast, listeners have difficulty detecting disappearing objects, even in small scenes: performance rapidly deteriorates with growing scene-size; response times are slow, and even when change is detected, the changed component is rarely successfully identified. We also measured change detection performance when a noise or silent gap was inserted at the time of change or when the scene was interrupted by a distractor that occurred at the time of change but did not mask any scene elements. Gaps adversely affected the processing of item appearance but not disappearance. However, distractors reduced both appearance and disappearance detection. Together, our results suggest a role for neural adaptation and sensitivity to transients in the process of auditory change detection, similar to what has been demonstrated for visual change detection. Importantly, listeners consistently performed better for item addition (relative to deletion) across all scene interruptions used, suggesting a robust perceptual representation of item appearance.

Type: Article
Title: Detection of appearing and disappearing objects in complex acoustic scenes.
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1371/journal.pone.0046167
Publisher version: http://dx.doi.org/10.1371/journal.pone.0046167
Language: English
Additional information: © Cervantes Constantino et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This study was supported by a Deafness Research United Kingdom (http://www.deafnessresearch.org.uk/) fellowship, and a Wellcome Trust project grant (093292/Z/10/Z) to MC. MK is employed by NTT Communication Science Laboratories, NTT Corporation, Japan. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Keywords: Adaptation, Physiological, Adult, Attention, Auditory Perception, Female, Hearing, Humans, Male, Noise, Psychoacoustics, Reaction Time
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > The Ear Institute
URI: https://discovery.ucl.ac.uk/id/eprint/1370873
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