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Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners
Auditory stream segregation is a perceptual process by which the human auditory system groups sounds from different sources into perceptually meaningful elements (e.g., a voice or a melody). The perceptual segregation of sounds is important, for example, for the understanding of speech in noisy scen...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6616076/ https://www.ncbi.nlm.nih.gov/pubmed/31333438 http://dx.doi.org/10.3389/fncom.2019.00042 |
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author | Paredes-Gallardo, Andreu Dau, Torsten Marozeau, Jeremy |
author_facet | Paredes-Gallardo, Andreu Dau, Torsten Marozeau, Jeremy |
author_sort | Paredes-Gallardo, Andreu |
collection | PubMed |
description | Auditory stream segregation is a perceptual process by which the human auditory system groups sounds from different sources into perceptually meaningful elements (e.g., a voice or a melody). The perceptual segregation of sounds is important, for example, for the understanding of speech in noisy scenarios, a particularly challenging task for listeners with a cochlear implant (CI). It has been suggested that some aspects of stream segregation may be explained by relatively basic neural mechanisms at a cortical level. During the past decades, a variety of models have been proposed to account for the data from stream segregation experiments in normal-hearing (NH) listeners. However, little attention has been given to corresponding findings in CI listeners. The present study investigated whether a neural model of sequential stream segregation, proposed to describe the behavioral effects observed in NH listeners, can account for behavioral data from CI listeners. The model operates on the stimulus features at the cortical level and includes a competition stage between the neuronal units encoding the different percepts. The competition arises from a combination of mutual inhibition, adaptation, and additive noise. The model was found to capture the main trends in the behavioral data from CI listeners, such as the larger probability of a segregated percept with increasing the feature difference between the sounds as well as the build-up effect. Importantly, this was achieved without any modification to the model's competition stage, suggesting that stream segregation could be mediated by a similar mechanism in both groups of listeners. |
format | Online Article Text |
id | pubmed-6616076 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-66160762019-07-22 Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners Paredes-Gallardo, Andreu Dau, Torsten Marozeau, Jeremy Front Comput Neurosci Neuroscience Auditory stream segregation is a perceptual process by which the human auditory system groups sounds from different sources into perceptually meaningful elements (e.g., a voice or a melody). The perceptual segregation of sounds is important, for example, for the understanding of speech in noisy scenarios, a particularly challenging task for listeners with a cochlear implant (CI). It has been suggested that some aspects of stream segregation may be explained by relatively basic neural mechanisms at a cortical level. During the past decades, a variety of models have been proposed to account for the data from stream segregation experiments in normal-hearing (NH) listeners. However, little attention has been given to corresponding findings in CI listeners. The present study investigated whether a neural model of sequential stream segregation, proposed to describe the behavioral effects observed in NH listeners, can account for behavioral data from CI listeners. The model operates on the stimulus features at the cortical level and includes a competition stage between the neuronal units encoding the different percepts. The competition arises from a combination of mutual inhibition, adaptation, and additive noise. The model was found to capture the main trends in the behavioral data from CI listeners, such as the larger probability of a segregated percept with increasing the feature difference between the sounds as well as the build-up effect. Importantly, this was achieved without any modification to the model's competition stage, suggesting that stream segregation could be mediated by a similar mechanism in both groups of listeners. Frontiers Media S.A. 2019-07-03 /pmc/articles/PMC6616076/ /pubmed/31333438 http://dx.doi.org/10.3389/fncom.2019.00042 Text en Copyright © 2019 Paredes-Gallardo, Dau and Marozeau. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience Paredes-Gallardo, Andreu Dau, Torsten Marozeau, Jeremy Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title | Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title_full | Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title_fullStr | Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title_full_unstemmed | Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title_short | Auditory Stream Segregation Can Be Modeled by Neural Competition in Cochlear Implant Listeners |
title_sort | auditory stream segregation can be modeled by neural competition in cochlear implant listeners |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6616076/ https://www.ncbi.nlm.nih.gov/pubmed/31333438 http://dx.doi.org/10.3389/fncom.2019.00042 |
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