Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.

Evidence that the auditory system contains specialised motion detectors is mixed. Many psychophysical studies confound speed cues with distance and duration cues and present sound sources that do not appear to move in external space. Here we use the 'discrimination contours' technique to p...

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Autores principales:	Tom C A Freeman, Johahn Leung, Ella Wufong, Emily Orchard-Mills, Simon Carlile, David Alais
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c822c63f429141b793c494b0417b4e4b
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spelling	oai:doaj.org-article:c822c63f429141b793c494b0417b4e4b2021-11-25T06:06:39ZDiscrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.1932-620310.1371/journal.pone.0102864https://doaj.org/article/c822c63f429141b793c494b0417b4e4b2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25076211/?tool=EBIhttps://doaj.org/toc/1932-6203Evidence that the auditory system contains specialised motion detectors is mixed. Many psychophysical studies confound speed cues with distance and duration cues and present sound sources that do not appear to move in external space. Here we use the 'discrimination contours' technique to probe the probabilistic combination of speed, distance and duration for stimuli moving in a horizontal arc around the listener in virtual auditory space. The technique produces a set of motion discrimination thresholds that define a contour in the distance-duration plane for different combination of the three cues, based on a 3-interval oddity task. The orientation of the contour (typically elliptical in shape) reveals which cue or combination of cues dominates. If the auditory system contains specialised motion detectors, stimuli moving over different distances and durations but defining the same speed should be more difficult to discriminate. The resulting discrimination contours should therefore be oriented obliquely along iso-speed lines within the distance-duration plane. However, we found that over a wide range of speeds, distances and durations, the ellipses aligned with distance-duration axes and were stretched vertically, suggesting that listeners were most sensitive to duration. A second experiment showed that listeners were able to make speed judgements when distance and duration cues were degraded by noise, but that performance was worse. Our results therefore suggest that speed is not a primary cue to motion in the auditory system, but that listeners are able to use speed to make discrimination judgements when distance and duration cues are unreliable.Tom C A FreemanJohahn LeungElla WufongEmily Orchard-MillsSimon CarlileDavid AlaisPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 7, p e102864 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tom C A Freeman Johahn Leung Ella Wufong Emily Orchard-Mills Simon Carlile David Alais Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
description	Evidence that the auditory system contains specialised motion detectors is mixed. Many psychophysical studies confound speed cues with distance and duration cues and present sound sources that do not appear to move in external space. Here we use the 'discrimination contours' technique to probe the probabilistic combination of speed, distance and duration for stimuli moving in a horizontal arc around the listener in virtual auditory space. The technique produces a set of motion discrimination thresholds that define a contour in the distance-duration plane for different combination of the three cues, based on a 3-interval oddity task. The orientation of the contour (typically elliptical in shape) reveals which cue or combination of cues dominates. If the auditory system contains specialised motion detectors, stimuli moving over different distances and durations but defining the same speed should be more difficult to discriminate. The resulting discrimination contours should therefore be oriented obliquely along iso-speed lines within the distance-duration plane. However, we found that over a wide range of speeds, distances and durations, the ellipses aligned with distance-duration axes and were stretched vertically, suggesting that listeners were most sensitive to duration. A second experiment showed that listeners were able to make speed judgements when distance and duration cues were degraded by noise, but that performance was worse. Our results therefore suggest that speed is not a primary cue to motion in the auditory system, but that listeners are able to use speed to make discrimination judgements when distance and duration cues are unreliable.
format	article
author	Tom C A Freeman Johahn Leung Ella Wufong Emily Orchard-Mills Simon Carlile David Alais
author_facet	Tom C A Freeman Johahn Leung Ella Wufong Emily Orchard-Mills Simon Carlile David Alais
author_sort	Tom C A Freeman
title	Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
title_short	Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
title_full	Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
title_fullStr	Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
title_full_unstemmed	Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
title_sort	discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/c822c63f429141b793c494b0417b4e4b
work_keys_str_mv	AT tomcafreeman discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception AT johahnleung discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception AT ellawufong discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception AT emilyorchardmills discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception AT simoncarlile discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception AT davidalais discriminationcontoursformovingsoundsrevealdurationanddistancecuesdominateauditoryspeedperception
_version_	1718414189656014848

Discrimination contours for moving sounds reveal duration and distance cues dominate auditory speed perception.

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