Revealing Human Activity from Wi-Fi Signals Using Machine Learning

Wi-Fi signals can detect the outline of a person’s body

Machine learning can analyze how human bodies disrupt the Wi-Fi signals to determine whether people are seated, standing or lying down.

Source:
https://www.newscientist.com/article/2356242-the-outline-of-peoples-bodies-can-be-detected-from-wi-fi-signals/