Brain-reading earbuds are already here, prompting urgent questions about children and neurodata

While it may sound like science fiction, earbuds that read brain activity are already on sale. Wearable technology company Neurable claims that its headphones, equipped with electroencephalography (EEG) sensors, can track your fatigue and reduce burnout. At night, NextSense's Smartbuds pick up the electrical signals of your brain to chart your sleep. By day, the same EEG sensors help schedule demanding tasks for the hours when you are sharpest.

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