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Auditory Compensation for Head Rotation Is Incomplete

Hearing is confronted by a similar problem to vision when the observer moves. The image motion that is created remains ambiguous until the observer knows the velocity of eye and/or head. One way the visual system solves this problem is to use motor commands, proprioception, and vestibular informatio...

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Autores principales: Freeman, Tom C. A., Culling, John F., Akeroyd, Michael A., Brimijoin, W. Owen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Psychological Association 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5289217/
https://www.ncbi.nlm.nih.gov/pubmed/27841453
http://dx.doi.org/10.1037/xhp0000321
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author Freeman, Tom C. A.
Culling, John F.
Akeroyd, Michael A.
Brimijoin, W. Owen
author_facet Freeman, Tom C. A.
Culling, John F.
Akeroyd, Michael A.
Brimijoin, W. Owen
author_sort Freeman, Tom C. A.
collection PubMed
description Hearing is confronted by a similar problem to vision when the observer moves. The image motion that is created remains ambiguous until the observer knows the velocity of eye and/or head. One way the visual system solves this problem is to use motor commands, proprioception, and vestibular information. These “extraretinal signals” compensate for self-movement, converting image motion into head-centered coordinates, although not always perfectly. We investigated whether the auditory system also transforms coordinates by examining the degree of compensation for head rotation when judging a moving sound. Real-time recordings of head motion were used to change the “movement gain” relating head movement to source movement across a loudspeaker array. We then determined psychophysically the gain that corresponded to a perceptually stationary source. Experiment 1 showed that the gain was small and positive for a wide range of trained head speeds. Hence, listeners perceived a stationary source as moving slightly opposite to the head rotation, in much the same way that observers see stationary visual objects move against a smooth pursuit eye movement. Experiment 2 showed the degree of compensation remained the same for sounds presented at different azimuths, although the precision of performance declined when the sound was eccentric. We discuss two possible explanations for incomplete compensation, one based on differences in the accuracy of signals encoding image motion and self-movement and one concerning statistical optimization that sacrifices accuracy for precision. We then consider the degree to which such explanations can be applied to auditory motion perception in moving listeners.
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spelling pubmed-52892172017-02-08 Auditory Compensation for Head Rotation Is Incomplete Freeman, Tom C. A. Culling, John F. Akeroyd, Michael A. Brimijoin, W. Owen J Exp Psychol Hum Percept Perform Reports Hearing is confronted by a similar problem to vision when the observer moves. The image motion that is created remains ambiguous until the observer knows the velocity of eye and/or head. One way the visual system solves this problem is to use motor commands, proprioception, and vestibular information. These “extraretinal signals” compensate for self-movement, converting image motion into head-centered coordinates, although not always perfectly. We investigated whether the auditory system also transforms coordinates by examining the degree of compensation for head rotation when judging a moving sound. Real-time recordings of head motion were used to change the “movement gain” relating head movement to source movement across a loudspeaker array. We then determined psychophysically the gain that corresponded to a perceptually stationary source. Experiment 1 showed that the gain was small and positive for a wide range of trained head speeds. Hence, listeners perceived a stationary source as moving slightly opposite to the head rotation, in much the same way that observers see stationary visual objects move against a smooth pursuit eye movement. Experiment 2 showed the degree of compensation remained the same for sounds presented at different azimuths, although the precision of performance declined when the sound was eccentric. We discuss two possible explanations for incomplete compensation, one based on differences in the accuracy of signals encoding image motion and self-movement and one concerning statistical optimization that sacrifices accuracy for precision. We then consider the degree to which such explanations can be applied to auditory motion perception in moving listeners. American Psychological Association 2016-11-14 2017-02 /pmc/articles/PMC5289217/ /pubmed/27841453 http://dx.doi.org/10.1037/xhp0000321 Text en © 2016 The Author(s) http://creativecommons.org/licenses/by/3.0/ This article has been published under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the American Psychological Association the exclusive right to publish the article and identify itself as the original publisher.
spellingShingle Reports
Freeman, Tom C. A.
Culling, John F.
Akeroyd, Michael A.
Brimijoin, W. Owen
Auditory Compensation for Head Rotation Is Incomplete
title Auditory Compensation for Head Rotation Is Incomplete
title_full Auditory Compensation for Head Rotation Is Incomplete
title_fullStr Auditory Compensation for Head Rotation Is Incomplete
title_full_unstemmed Auditory Compensation for Head Rotation Is Incomplete
title_short Auditory Compensation for Head Rotation Is Incomplete
title_sort auditory compensation for head rotation is incomplete
topic Reports
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5289217/
https://www.ncbi.nlm.nih.gov/pubmed/27841453
http://dx.doi.org/10.1037/xhp0000321
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