> measure the heartbeat of a single person in a completely non-invasive manner NIST, "Monitoring Respiratory Motion with Wi-Fi CSI" (2022), https://www.nist.go

> measure the heartbeat of a single person in a completely non-invasive manner NIST, "Monitoring Respiratory Motion with Wi-Fi CSI" (2022), https://www.nist.gov/news-events/news/2022/12/wi-fi-could-help-identify-when-youre-struggling-breathe https://www.nist.gov/news-events/news/2022/12/wi-fi-could-he... & https://doi.org/10.1109/ACCESS.2022.3230003 https://doi.org/10.1109/ACCESS.2022.3230003 Google: Nest Hub sleep sensing for one person, with Fitbit Premium, https://www.techradar.com/health-fitness/how-to-track-your-sleep-with-google-nest-hub https://www.techradar.com/health-fitness/how-to-track-your-s...