heart rate monitoring via audioplethysmography

pie in the sky idea. would be the first consumer device capable of doing this. as discussed here: https://9to5google.com/2023/10/27/google-anc-earbuds-heart-rate/

and the full research paper available here: https://storage.googleapis.com/pub-tools-public-publication-data/pdf/e107049945d4e506308b995a7d9d77daff1f6133.pdf