In the past few years it has been demonstrated that electroencephalography (EEG) can be recorded from inside the ear (in-ear EEG). To open the door to low-profile earpieces as wearable brain-computer interfaces (BCIs), this work presents a practical in-ear EEG device based on multiple dry electrodes, a user-generic design, and a lightweight wireless interface for streaming data and device programming. The earpiece is designed for improved ear canal contact across a wide population of users and is fabricated in a low-cost and scalable manufacturing process based on standard techniques such as vacuum forming, plasma-treatment, and spray coating. A 2.5 × 2.5 cm ² wireless recording module is designed to record and stream data wirelessly to a host computer. Performance was evaluated on three human subjects over three months and compared with clinical-grade wet scalp EEG recordings. Recordings of spontaneous and evoked physiological signals, eye-blinks, alpha rhythm, and the auditory steady-state response (ASSR), are presented. This is the first wireless in-ear EEG to our knowledge to incorporate a dry multielectrode, user-generic design. The user-generic ear EEG recorded a mean alpha modulation of 2.17, outperforming the state-of-the-art in dry electrode in-ear EEG systems.

中文翻译：

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无线用户通用耳式脑电图。

在过去的几年中，已经证明可以从耳朵内部（入耳式EEG）记录脑电图（EEG）。为了打开低调耳机作为可穿戴式脑机接口（BCI）的大门，这项工作提出了一种实用的入耳式EEG设备，该设备基于多个干电极，用户通用设计以及用于传输数据和数据的轻巧无线接口。设备编程。该耳机设计用于改善广大用户的耳道接触，并基于低成本技术（例如真空成型，等离子处理和喷涂），以低成本，可扩展的制造工艺制造。2.5×2.5厘米 ²无线记录模块旨在将数据无线记录和传输到主机。在三个月内对三名人类受试者的表现进行了评估，并与临床级别的湿头皮脑电图记录进行了比较。呈现自发性和诱发性生理信号，眨眼，阿尔法节律和听觉稳态反应（ASSR）的记录。据我们所知，这是第一款结合干式多电极用户通用设计的无线入耳式EEG。用户通用型耳朵EEG记录的平均α调制为2.17，优于干电极入耳式EEG系统中的最新技术。