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You don’t need to use cameras for this. A simple speaker and microphone is all you need to make a functioning motion sensor. Just exploiting the doppler effect.
by mygo 8y ago
You don’t need to use cameras for this. A simple speaker and microphone is all you need to make a functioning motion sensor. Just exploiting the doppler effect. And even better, you can do it all outside of the human audible spectrum. And it can work with capturing motion around corners, too, since sound bounces off walls.
I’d recommend something like this in every room, or even IR sensors, over cameras. You don’t want to capture video of your children jerking off.
- tomatsu 8y ago> A simple speaker and microphone is all you need to make a functioning motion sensor. You could just use an infrared motion sensor. They are dirt cheap and widely used for controlling lights. The AC unit at work has one, too. So, all of this already exists. Without spying capabilities, that is.