Single-channel in-ear-EEG detects the focus of auditory attention to concurrent tone streams and mixed speech
Single-channel in-ear-EEG detects the focus of auditory attention to concurrent tone streams and mixed speech
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DOI：
10.1088/1741-2552/aa66dd
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发表时间：
2017-06-01
影响因子：
4
通讯作者：
Obleser, Jonas
中科院分区：
文献类型：
--
作者：
Fiedler, Lorenz;Woestmann, Malte;Obleser, Jonas
目标。传统的多通道头皮脑电图（EEG）可以在同时聆听（“鸡尾酒会”）的情况下识别与会的演讲者。这意味着脑电图可能提供有价值的信息，以补充某种形式的脑电图助听器，并安装一定程度的神经反馈。的方法。为了研究是否可以通过与助听器兼容的单通道脑电图配置来检测听者的注意力集中，我们记录了耳道内三个电极的脑电图（“耳内脑电图”）以及头皮上64个电极的脑电图。在两项不同的并发听力任务中，参与者（n = 7）配备了个性化的耳内脑电图片段，并被要求听两个双重呈现的并发音调流中的一个，或者听两个双重呈现的并发有声读物中的一个。训练前向编码模型预测单通道脑电信号响应。主要的结果。每个参与者的注意焦点可以通过单通道EEG响应检测到，该响应记录于仅由单个耳内EEG电极和相邻的头皮EEG电极组成的近距离配置。受试者对参与和忽略刺激的神经反应差异在形态学（即极性和潜伏期）上是一致的。的意义。总之，我们的研究结果表明，单通道、助听器兼容配置的脑电图反应为识别听者的注意力焦点提供了有价值的信息。
Objective. Conventional, multi-channel scalp electroencephalography (EEG) allows the identification of the attended speaker in concurrent-listening ('cocktail party') scenarios. This implies that EEG might provide valuable information to complement hearing aids with some form of EEG and to install a level of neuro-feedback. Approach. To investigate whether a listener's attentional focus can be detected from single-channel hearing-aid-compatible EEG configurations, we recorded EEG from three electrodes inside the ear canal ('in-Ear-EEG') and additionally from 64 electrodes on the scalp. In two different, concurrent listening tasks, participants (n = 7) were fitted with individualized in-Ear-EEG pieces and were either asked to attend to one of two dichotically-presented, concurrent tone streams or to one of two diotically-presented, concurrent audiobooks. A forward encoding model was trained to predict the EEG response at single EEG channels. Main results. Each individual participants' attentional focus could be detected from single-channel EEG response recorded from short-distance configurations consisting only of a single in-Ear-EEG electrode and an adjacent scalp-EEG electrode. The differences in neural responses to attended and ignored stimuli were consistent in morphology (i.e. polarity and latency of components) across subjects. Significance. In sum, our findings show that the EEG response from a single-channel, hearing-aid-compatible configuration provides valuable information to identify a listener's focus of attention.