The MN8 electroencephalography device looks like any set of sleek wireless earphones. Its buds can rest unobtrusively in the ear's concha for a whole workday and that, its makers at San Francisco-based Emotiv say, is the point.
https://www.vice.com/en_us/article/qj4qd7/this-company-wants-to-help-your-boss-monitor-your-brainwaves-at-work
https://www.vice.com/en_us/article/qj4qd7/this-company-wants-to-help-your-boss-monitor-your-brainwaves-at-work