why can it detect humans and not other moving objects?
knowing how many people on the other side of the wall will change our sense of privacy
knowing how many people on the other side of the wall will change our sense of privacy
It is possible that this tech is especially effective at tracking humans due to the fact that we're bags of mostly water and the specific frequency used interacts with water more than other nearby frequencies. (I'm not a microwave engineer, so I don't know this for sure)