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Weird website, looks like it was copied from somewhere that had more information. What is the inward-facing ultrasonic microphone for?
by wiml 3y ago
Weird website, looks like it was copied from somewhere that had more information.
What is the inward-facing ultrasonic microphone for?
- moron4hire 3y agoJust a guess, as I only know a little about hearing aids, but maybe it's to measure the acoustic properties of the ear canal to be able to dynamically reproject the frequency spectrum of incoming sound to bands that the ear in question can actually hear.
- petemir 3y agoYes. There is research dealing e.g. with ear canal-based authentication. Other earables (Omnibuds by Nokia Bell Labs http://omnibuds.tech/ http://omnibuds.tech/) use the inward-facing microphone to detect the sound of the heartbeat. With this (plus a PPG sensor) they can estimate blood pressure (after calibration).