Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes

Bröhl F, Kayser C (2021)
NeuroImage 233: 117958.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The representation of speech in the brain is often examined by measuring the alignment of rhythmic brain activity to the speech envelope. To conveniently quantify this alignment (termed ‘speech tracking’) many studies consider the broadband speech envelope, which combines acoustic fluctuations across the spectral range. Using EEG recordings, we show that using this broadband envelope can provide a distorted picture on speech encoding. We systematically investigated the encoding of spectrally-limited speech-derived envelopes presented by individual and multiple noise carriers in the human brain. Tracking in the 1 to 6 Hz EEG bands differentially reflected low (0.2 - 0.83 kHz) and high (2.66 - 8 kHz) frequency speech-derived envelopes. This was independent of the specific carrier frequency but sensitive to attentional manipulations, and may reflect the context-dependent emphasis of information from distinct spectral ranges of the speech envelope in low frequency brain activity. As low and high frequency speech envelopes relate to distinct phonemic features, our results suggest that functionally distinct processes contribute to speech tracking in the same EEG bands, and are easily confounded when considering the broadband speech envelope.
Erscheinungsjahr
2021
Zeitschriftentitel
NeuroImage
Band
233
Art.-Nr.
117958
ISSN
1053-8119
Page URI
https://pub.uni-bielefeld.de/record/2952929

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Bröhl F, Kayser C. Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes. NeuroImage. 2021;233: 117958.
Bröhl, F., & Kayser, C. (2021). Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes. NeuroImage, 233, 117958. https://doi.org/10.1016/j.neuroimage.2021.117958
Bröhl, F., and Kayser, C. (2021). Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes. NeuroImage 233:117958.
Bröhl, F., & Kayser, C., 2021. Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes. NeuroImage, 233: 117958.
F. Bröhl and C. Kayser, “Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes”, NeuroImage, vol. 233, 2021, : 117958.
Bröhl, F., Kayser, C.: Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes. NeuroImage. 233, : 117958 (2021).
Bröhl, Felix, and Kayser, Christoph. “Delta/theta band EEG differentially tracks low and high frequency speech-derived envelopes”. NeuroImage 233 (2021): 117958.

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PMID: 33744458
PubMed | Europe PMC

Preprint: 10.1101/2020.07.26.221838

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