Alpha Oscillations During Effortful Continuous Speech: From Scalp EEG to Ear-EEG

被引:11
作者
Ala, Tirdad Seifi [1 ,2 ]
Alickovic, Emina [1 ,3 ]
Cabrera, Alvaro Fuentes [4 ]
Whitmer, William M. M. [5 ]
Hadley, Lauren V. V. [5 ]
Rank, Mike L. L. [4 ]
Lunner, Thomas [1 ]
Graversen, Carina [1 ]
机构
[1] Oticon AS, Eriksholm Res Ctr, Smorum, Denmark
[2] Univ Nottingham, Sch Med, Div Mental Hlth & Clin Neurosci, Hearing Sci Scottish Sect, Nottingham NG7 2RD, England
[3] Linkoping Univ, Dept Elect Engn, Linkoping, Sweden
[4] T&W Engn AS, Lillerod, Denmark
[5] Univ Nottingham, Sch Med, Div Mental Hlth & Clin Neurosci, Hearing Sci Scottish Sect, Nottingham, England
基金
英国医学研究理事会; 欧盟地平线“2020”;
关键词
Electroencephalography; Electrodes; Scalp; Task analysis; Signal to noise ratio; Loudspeakers; Power measurement; Alpha power; EEG; ear-EEG; Listening Effort; LISTENING EFFORT; NOISE-REDUCTION; MEMORY LOAD; BRAIN; ATTENTION;
D O I
10.1109/TBME.2022.3214428
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Objective: The purpose of this study was to investigate alpha power as an objective measure of effortful listening in continuous speech with scalp and ear-EEG. Methods: Scalp and ear-EEG were recorded simultaneously during presentation of a 33-s news clip in the presence of 16-talker babble noise. Four different signal-to-noise ratios (SNRs) were used to manipulate task demand. The effects of changes in SNR were investigated on alpha event-related synchronization (ERS) and desynchronization (ERD). Alpha activity was extracted from scalp EEG using different referencing methods (common average and symmetrical bi-polar) in different regions of the brain (parietal and temporal) and ear-EEG. Results: Alpha ERS decreased with decreasing SNR (i.e., increasing task demand) in both scalp and ear-EEG. Alpha ERS was also positively correlated to behavioural performance which was based on the questions regarding the contents of the speech. Conclusion: Alpha ERS/ERD is better suited to track performance of a continuous speech than listening effort. Significance: EEG alpha power in continuous speech may indicate of how well the speech was perceived and it can be measured with both scalp and Ear-EEG.
引用
收藏
页码:1264 / 1273
页数:10
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