Signal envelope and speech intelligibility differentially impact auditory motion perception

Abstract Our acoustic environment contains a plethora of complex sounds that are often in motion. To gauge approaching danger and communicate effectively, listeners need to localize and identify sounds, which includes determining sound motion. This study addresses which acoustic cues impact listener...

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Autores principales:	Michaela Warnecke, Ruth Y. Litovsky
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/26343c16faee4c2ca926654808774034
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spelling	oai:doaj.org-article:26343c16faee4c2ca9266548087740342021-12-02T16:26:22ZSignal envelope and speech intelligibility differentially impact auditory motion perception10.1038/s41598-021-94662-y2045-2322https://doaj.org/article/26343c16faee4c2ca9266548087740342021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94662-yhttps://doaj.org/toc/2045-2322Abstract Our acoustic environment contains a plethora of complex sounds that are often in motion. To gauge approaching danger and communicate effectively, listeners need to localize and identify sounds, which includes determining sound motion. This study addresses which acoustic cues impact listeners’ ability to determine sound motion. Signal envelope (ENV) cues are implicated in both sound motion tracking and stimulus intelligibility, suggesting that these processes could be competing for sound processing resources. We created auditory chimaera from speech and noise stimuli and varied the number of frequency bands, effectively manipulating speech intelligibility. Normal-hearing adults were presented with stationary or moving chimaeras and reported perceived sound motion and content. Results show that sensitivity to sound motion is not affected by speech intelligibility, but shows a clear difference for original noise and speech stimuli. Further, acoustic chimaera with speech-like ENVs which had intelligible content induced a strong bias in listeners to report sounds as stationary. Increasing stimulus intelligibility systematically increased that bias and removing intelligible content reduced it, suggesting that sound content may be prioritized over sound motion. These findings suggest that sound motion processing in the auditory system can be biased by acoustic parameters related to speech intelligibility.Michaela WarneckeRuth Y. LitovskyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Michaela Warnecke Ruth Y. Litovsky Signal envelope and speech intelligibility differentially impact auditory motion perception
description	Abstract Our acoustic environment contains a plethora of complex sounds that are often in motion. To gauge approaching danger and communicate effectively, listeners need to localize and identify sounds, which includes determining sound motion. This study addresses which acoustic cues impact listeners’ ability to determine sound motion. Signal envelope (ENV) cues are implicated in both sound motion tracking and stimulus intelligibility, suggesting that these processes could be competing for sound processing resources. We created auditory chimaera from speech and noise stimuli and varied the number of frequency bands, effectively manipulating speech intelligibility. Normal-hearing adults were presented with stationary or moving chimaeras and reported perceived sound motion and content. Results show that sensitivity to sound motion is not affected by speech intelligibility, but shows a clear difference for original noise and speech stimuli. Further, acoustic chimaera with speech-like ENVs which had intelligible content induced a strong bias in listeners to report sounds as stationary. Increasing stimulus intelligibility systematically increased that bias and removing intelligible content reduced it, suggesting that sound content may be prioritized over sound motion. These findings suggest that sound motion processing in the auditory system can be biased by acoustic parameters related to speech intelligibility.
format	article
author	Michaela Warnecke Ruth Y. Litovsky
author_facet	Michaela Warnecke Ruth Y. Litovsky
author_sort	Michaela Warnecke
title	Signal envelope and speech intelligibility differentially impact auditory motion perception
title_short	Signal envelope and speech intelligibility differentially impact auditory motion perception
title_full	Signal envelope and speech intelligibility differentially impact auditory motion perception
title_fullStr	Signal envelope and speech intelligibility differentially impact auditory motion perception
title_full_unstemmed	Signal envelope and speech intelligibility differentially impact auditory motion perception
title_sort	signal envelope and speech intelligibility differentially impact auditory motion perception
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/26343c16faee4c2ca926654808774034
work_keys_str_mv	AT michaelawarnecke signalenvelopeandspeechintelligibilitydifferentiallyimpactauditorymotionperception AT ruthylitovsky signalenvelopeandspeechintelligibilitydifferentiallyimpactauditorymotionperception
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Signal envelope and speech intelligibility differentially impact auditory motion perception

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