It turns out that the channel state in modern Wi-Fi is quite sensitive to tiny movements and environmental changes. By precisely measuring the time of flight and angle of arrival of Wi-Fi signals bouncing around a room, Delta has crafted algorithms that can track breathing with great precision.
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https://www.techspot.com/news/103298-wi-fi-can-measure-breath-heartbeat-remarkable-accuracy.html?utm_source=dlvr.it&utm_medium=blogger
Read Entire Article
https://www.techspot.com/news/103298-wi-fi-can-measure-breath-heartbeat-remarkable-accuracy.html?utm_source=dlvr.it&utm_medium=blogger