Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking

Abstract Envelope (E) and temporal fine structure (TFS) are important features of acoustic signals and their corresponding perceptual function has been investigated with various listening tasks. To further understand the underlying neural processing of TFS, experiments in humans and animals were con...

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Autores principales:	Yingyue Xu, Maxin Chen, Petrina LaFaire, Xiaodong Tan, Claus-Peter Richter
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ec863ad83a8a47d9820e96acffea71c9
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spelling	oai:doaj.org-article:ec863ad83a8a47d9820e96acffea71c92021-12-02T15:05:30ZDistorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking10.1038/s41598-017-12975-32045-2322https://doaj.org/article/ec863ad83a8a47d9820e96acffea71c92017-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-12975-3https://doaj.org/toc/2045-2322Abstract Envelope (E) and temporal fine structure (TFS) are important features of acoustic signals and their corresponding perceptual function has been investigated with various listening tasks. To further understand the underlying neural processing of TFS, experiments in humans and animals were conducted to demonstrate the effects of modifying the TFS in natural speech sentences on both speech recognition and neural coding. The TFS of natural speech sentences was modified by distorting the phase and maintaining the magnitude. Speech intelligibility was then tested for normal-hearing listeners using the intact and reconstructed sentences presented in quiet and against background noise. Sentences with modified TFS were then used to evoke neural activity in auditory neurons of the inferior colliculus in guinea pigs. Our study demonstrated that speech intelligibility in humans relied on the periodic cues of speech TFS in both quiet and noisy listening conditions. Furthermore, recordings of neural activity from the guinea pig inferior colliculus have shown that individual auditory neurons exhibit phase locking patterns to the periodic cues of speech TFS that disappear when reconstructed sounds do not show periodic patterns anymore. Thus, the periodic cues of TFS are essential for speech intelligibility and are encoded in auditory neurons by phase locking.Yingyue XuMaxin ChenPetrina LaFaireXiaodong TanClaus-Peter RichterNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yingyue Xu Maxin Chen Petrina LaFaire Xiaodong Tan Claus-Peter Richter Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
description	Abstract Envelope (E) and temporal fine structure (TFS) are important features of acoustic signals and their corresponding perceptual function has been investigated with various listening tasks. To further understand the underlying neural processing of TFS, experiments in humans and animals were conducted to demonstrate the effects of modifying the TFS in natural speech sentences on both speech recognition and neural coding. The TFS of natural speech sentences was modified by distorting the phase and maintaining the magnitude. Speech intelligibility was then tested for normal-hearing listeners using the intact and reconstructed sentences presented in quiet and against background noise. Sentences with modified TFS were then used to evoke neural activity in auditory neurons of the inferior colliculus in guinea pigs. Our study demonstrated that speech intelligibility in humans relied on the periodic cues of speech TFS in both quiet and noisy listening conditions. Furthermore, recordings of neural activity from the guinea pig inferior colliculus have shown that individual auditory neurons exhibit phase locking patterns to the periodic cues of speech TFS that disappear when reconstructed sounds do not show periodic patterns anymore. Thus, the periodic cues of TFS are essential for speech intelligibility and are encoded in auditory neurons by phase locking.
format	article
author	Yingyue Xu Maxin Chen Petrina LaFaire Xiaodong Tan Claus-Peter Richter
author_facet	Yingyue Xu Maxin Chen Petrina LaFaire Xiaodong Tan Claus-Peter Richter
author_sort	Yingyue Xu
title	Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
title_short	Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
title_full	Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
title_fullStr	Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
title_full_unstemmed	Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
title_sort	distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/ec863ad83a8a47d9820e96acffea71c9
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_version_	1718388802692579328

Distorting temporal fine structure by phase shifting and its effects on speech intelligibility and neural phase locking

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