Ghost Murmur was described as a futuristic CIA tool that could detect a heartbeat from vast distances. Physicists say the public story clashes with the basic limits of magnetic sensing
If they’re detecting it based on electric fields they absolutely won’t be able to pull off usable range outside of an area with absolutely no big collection of metal (can not be used near buildings or roads)
Typical range for sensors that can pick up human electric fields (mostly generated by muscles and nerves) is a few meters. If you try to boost it enough for long range outdoors use then your sensor is gonna get screamed to death by the sun and atmospheric noise
If they’re detecting it based on electric fields they absolutely won’t be able to pull off usable range outside of an area with absolutely no big collection of metal (can not be used near buildings or roads)
Typical range for sensors that can pick up human electric fields (mostly generated by muscles and nerves) is a few meters. If you try to boost it enough for long range outdoors use then your sensor is gonna get screamed to death by the sun and atmospheric noise