ArticleThe European journal of neuroscience2022
Degradation levels of continuous speech affect neural speech tracking and alpha power differently.
Article in The European journal of neuroscience, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed.
- Article
- Cortical speech envelope tracking reflects lesion-symptom profiles in post-stroke aphasia.Brain communications · 2026Article
- The effects of vocal emotions and emotional context on the neural tracking of speech envelopes and listeners' vigilance states.Frontiers in human neuroscience · 2026Article
- Attention to speech modulates distortion product otoacoustic emissions evoked by speech-derived stimuli in humans.Frontiers in neuroscience · 2026Article
- Neural tracking of continuous speech reveals enhanced late responses to degraded speech.Frontiers in neuroscience · 2026Article
- Differential effects of external noise and situational interest on neurophysiological responses during video based learning.NPJ science of learning · 2025Article
- Article
- Neural speech tracking in noise reflects the opposing influence of SNR on intelligibility and attentional effort.Imaging neuroscience (Cambridge, Mass.) · 2025Article
- Opposing neural processing modes alternate rhythmically during sustained auditory attention.Communications biology · 2024Article
- Article
- Early language experience modulates the tradeoff between acoustic-temporal and lexico-semantic cortical tracking of speech.iScience · 2024Article
- Neural speech tracking shifts from the syllabic to the modulation rate of speech as intelligibility decreases.Psychophysiology · 2023Article
- Naturalistic Spoken Language Comprehension Is Supported by Alpha and Beta Oscillations.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023Article
- Expectations boost the reconstruction of auditory features from electrophysiological responses to noisy speech.Cerebral cortex (New York, N.Y. : 1991) · 2023Article
- Alerting attention is sufficient to induce a phase-dependent behavior that can be predicted by frontal EEG.Frontiers in behavioral neuroscience · 2023Article
- Rhythms in cognition: The evidence revisited.The European journal of neuroscience · 2022Article
- Degradation levels of continuous speech affect neural speech tracking and alpha power differently.The European journal of neuroscience · 2022Article
- Neural responses to naturalistic audiovisual speech are related to listening demand in cochlear implant users.Frontiers in human neuroscience · 2022Article
- Decoding Object-Based Auditory Attention from Source-Reconstructed MEG Alpha Oscillations.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021Article
- EEG power spectral dynamics associated with listening in adverse conditions.Psychophysiology · 2021Article
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5 authors.
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Abstract
Making sense of a poor auditory signal can pose a challenge. Previous attempts to quantify speech intelligibility in neural terms have usually focused on one of two measures, namely low-frequency speech-brain synchronization or alpha power modulations. However, reports have been mixed concerning the modulation of these measures, an issue aggravated by the fact that they have normally been studied separately. We present two MEG studies analyzing both measures. In study 1, participants listened to unimodal auditory speech with three different levels of degradation (original, 7-channel and 3-channel vocoding). Intelligibility declined with declining clarity, but speech was still intelligible to some extent even for the lowest clarity level (3-channel vocoding). Low-frequency (1-7 Hz) speech tracking suggested a U-shaped relationship with strongest effects for the medium-degraded speech (7-channel) in bilateral auditory and left frontal regions. To follow up on this finding, we implemented three additional vocoding levels (5-channel, 2-channel and 1-channel) in a second MEG study. Using this wider range of degradation, the speech-brain synchronization showed a similar pattern as in study 1, but further showed that when speech becomes unintelligible, synchronization declines again. The relationship differed for alpha power, which continued to decrease across vocoding levels reaching a floor effect for 5-channel vocoding. Predicting subjective intelligibility based on models either combining both measures or each measure alone showed superiority of the combined model. Our findings underline that speech tracking and alpha power are modified differently by the degree of degradation of continuous speech but together contribute to the subjective speech understanding.
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