Ear-EEG Measures of Auditory Attention to Continuous Speech

被引:9
|
作者
Holtze, Bjoern [1 ]
Rosenkranz, Marc [2 ]
Jaeger, Manuela [1 ,3 ]
Debener, Stefan [1 ,4 ]
Mirkovic, Bojana [1 ]
机构
[1] Carl von Ossietzky Univ Oldenburg, Dept Psychol, Neuropsychol Lab, Oldenburg, Germany
[2] Carl von Ossietzky Univ Oldenburg, Dept Psychol, Neurophysiol Everyday Life Grp, Oldenburg, Germany
[3] Fraunhofer Inst Digital Media Technol IDMT, Div Hearing Speech & Audio Technol, Oldenburg, Germany
[4] Carl von Ossietzky Univ Oldenburg, Res Ctr Neurosensory Sci, Oldenburg, Germany
关键词
around-the-ear EEG; cEEGrid; auditory attention; speech envelope tracking; intersubject correlation (ISC); spectral entropy; auditory attention decoding (AAD); SELECTIVE ATTENTION; COCKTAIL PARTY; RESPONSES; OSCILLATIONS; MECHANISMS; TIME;
D O I
10.3389/fnins.2022.869426
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Auditory attention is an important cognitive function used to separate relevant from irrelevant auditory information. However, most findings on attentional selection have been obtained in highly controlled laboratory settings using bulky recording setups and unnaturalistic stimuli. Recent advances in electroencephalography (EEG) facilitate the measurement of brain activity outside the laboratory, and around-the-ear sensors such as the cEEGrid promise unobtrusive acquisition. In parallel, methods such as speech envelope tracking, intersubject correlations and spectral entropy measures emerged which allow us to study attentional effects in the neural processing of natural, continuous auditory scenes. In the current study, we investigated whether these three attentional measures can be reliably obtained when using around-the-ear EEG. To this end, we analyzed the cEEGrid data of 36 participants who attended to one of two simultaneously presented speech streams. Speech envelope tracking results confirmed a reliable identification of the attended speaker from cEEGrid data. The accuracies in identifying the attended speaker increased when fitting the classification model to the individual. Artifact correction of the cEEGrid data with artifact subspace reconstruction did not increase the classification accuracy. Intersubject correlations were higher for those participants attending to the same speech stream than for those attending to different speech streams, replicating previously obtained results with high-density cap-EEG. We also found that spectral entropy decreased over time, possibly reflecting the decrease in the listener's level of attention. Overall, these results support the idea of using ear-EEG measurements to unobtrusively monitor auditory attention to continuous speech. This knowledge may help to develop assistive devices that support listeners separating relevant from irrelevant information in complex auditory environments.
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页数:14
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