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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Psychological Association
2016
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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. |
format | Online Article Text |
id | pubmed-5289217 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | American Psychological Association |
record_format | MEDLINE/PubMed |
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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