https://www.newscientist.com/article/2266373-smart-speakers-could-hear-your-heart-beating-from-across-the-room/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
Computers can measure your pulse remotely by bouncing ultrasound waves off your body and analysing the reflections to detect the tiny chest movements caused by your heart pumping. The system could one day operate on home smart speaker devices......