Instead, the system passively monitors the user’s home or activities to detect problems.
Examples of this kind of system include wearable pendants that can detect a fall, sensor pads that can record how long a person stays in bed, and motion detectors that keep track of activity in the house.
Advantages of passive monitoring:
Passive monitoring is an area of rapidly-evolving technology. This is where a lot of research is happening right now, and companies are trying hard to figure out a monitoring system that consumers will want to buy.
Examples of passive monitoring include FineThanx and BeClose
Lazy cat by David Blackwell via Flickr Creative Commons