Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.

The human brain tracks amplitude fluctuations of both speech and music, which reflects acoustic processing in addition to the encoding of higher-order features and one's cognitive state. Comparing neural tracking of speech and music envelopes can elucidate stimulus-general mechanisms, but direc...

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Autores principales:	Nathaniel J Zuk, Jeremy W Murphy, Richard B Reilly, Edmund C Lalor
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/5d03b1592d494788875b452e8c1514c1
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id	oai:doaj.org-article:5d03b1592d494788875b452e8c1514c1
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spelling	oai:doaj.org-article:5d03b1592d494788875b452e8c1514c12021-12-02T19:57:46ZEnvelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.1553-734X1553-735810.1371/journal.pcbi.1009358https://doaj.org/article/5d03b1592d494788875b452e8c1514c12021-09-01T00:00:00Zhttps://doi.org/10.1371/journal.pcbi.1009358https://doaj.org/toc/1553-734Xhttps://doaj.org/toc/1553-7358The human brain tracks amplitude fluctuations of both speech and music, which reflects acoustic processing in addition to the encoding of higher-order features and one's cognitive state. Comparing neural tracking of speech and music envelopes can elucidate stimulus-general mechanisms, but direct comparisons are confounded by differences in their envelope spectra. Here, we use a novel method of frequency-constrained reconstruction of stimulus envelopes using EEG recorded during passive listening. We expected to see music reconstruction match speech in a narrow range of frequencies, but instead we found that speech was reconstructed better than music for all frequencies we examined. Additionally, models trained on all stimulus types performed as well or better than the stimulus-specific models at higher modulation frequencies, suggesting a common neural mechanism for tracking speech and music. However, speech envelope tracking at low frequencies, below 1 Hz, was associated with increased weighting over parietal channels, which was not present for the other stimuli. Our results highlight the importance of low-frequency speech tracking and suggest an origin from speech-specific processing in the brain.Nathaniel J ZukJeremy W MurphyRichard B ReillyEdmund C LalorPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Computational Biology, Vol 17, Iss 9, p e1009358 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Nathaniel J Zuk Jeremy W Murphy Richard B Reilly Edmund C Lalor Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
description	The human brain tracks amplitude fluctuations of both speech and music, which reflects acoustic processing in addition to the encoding of higher-order features and one's cognitive state. Comparing neural tracking of speech and music envelopes can elucidate stimulus-general mechanisms, but direct comparisons are confounded by differences in their envelope spectra. Here, we use a novel method of frequency-constrained reconstruction of stimulus envelopes using EEG recorded during passive listening. We expected to see music reconstruction match speech in a narrow range of frequencies, but instead we found that speech was reconstructed better than music for all frequencies we examined. Additionally, models trained on all stimulus types performed as well or better than the stimulus-specific models at higher modulation frequencies, suggesting a common neural mechanism for tracking speech and music. However, speech envelope tracking at low frequencies, below 1 Hz, was associated with increased weighting over parietal channels, which was not present for the other stimuli. Our results highlight the importance of low-frequency speech tracking and suggest an origin from speech-specific processing in the brain.
format	article
author	Nathaniel J Zuk Jeremy W Murphy Richard B Reilly Edmund C Lalor
author_facet	Nathaniel J Zuk Jeremy W Murphy Richard B Reilly Edmund C Lalor
author_sort	Nathaniel J Zuk
title	Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
title_short	Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
title_full	Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
title_fullStr	Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
title_full_unstemmed	Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
title_sort	envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/5d03b1592d494788875b452e8c1514c1
work_keys_str_mv	AT nathanieljzuk envelopereconstructionofspeechandmusichighlightsstrongertrackingofspeechatlowfrequencies AT jeremywmurphy envelopereconstructionofspeechandmusichighlightsstrongertrackingofspeechatlowfrequencies AT richardbreilly envelopereconstructionofspeechandmusichighlightsstrongertrackingofspeechatlowfrequencies AT edmundclalor envelopereconstructionofspeechandmusichighlightsstrongertrackingofspeechatlowfrequencies
_version_	1718375779216130048

Envelope reconstruction of speech and music highlights stronger tracking of speech at low frequencies.

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