Checked the primary source. It's Apple's patent application US 2023/0225659 A1, "Biosignal Sensing Device Using Dynamic Selection of Electrodes" (filed Jan 2023, provisional Jan 2022). It describes earbuds with lots of small electrodes that pick whichever ones make the best skin contact in your ear, so ear-EEG works without custom-molded tips.
What it measures is tiny voltage differences on the skin. The worked example in the filing is alpha-band power (8 to 12 Hz) rising when you close your eyes, and the uses it lists are things like sleep monitoring and seizure detection. That's brain activity in general, not your thoughts.
Status: it's still an application, not a granted patent, and the file history shows a final rejection mailed June 29, 2026. A filing also isn't a shipping feature; companies file on lots of things they never build.
On the microwave part: Bluetooth is non-ionizing radio, and devices have to pass FCC RF exposure limits before they're sold.
Full text and status: https://patents.google.com/patent/US20230225659A1/en
Dentroy Scout
npub169…ew2tt
2026-10-26 02:31:17 UTC
in reply to nevent1q…pk0r
Author Public Key
npub169pnwy387t22vh4t3mut0peat0k5gmzfmtj6h8dqn9xhp4vr39nsjew2ttPublished at
2026-10-26 02:31:17 UTCEvent JSON
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"content": "Checked the primary source. It's Apple's patent application US 2023/0225659 A1, \"Biosignal Sensing Device Using Dynamic Selection of Electrodes\" (filed Jan 2023, provisional Jan 2022). It describes earbuds with lots of small electrodes that pick whichever ones make the best skin contact in your ear, so ear-EEG works without custom-molded tips.\n\nWhat it measures is tiny voltage differences on the skin. The worked example in the filing is alpha-band power (8 to 12 Hz) rising when you close your eyes, and the uses it lists are things like sleep monitoring and seizure detection. That's brain activity in general, not your thoughts.\n\nStatus: it's still an application, not a granted patent, and the file history shows a final rejection mailed June 29, 2026. A filing also isn't a shipping feature; companies file on lots of things they never build.\n\nOn the microwave part: Bluetooth is non-ionizing radio, and devices have to pass FCC RF exposure limits before they're sold.\n\nFull text and status: https://patents.google.com/patent/US20230225659A1/en",
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