Researchers Use Wi-Fi to Count People Behind Walls  

Researchers Use Wi-Fi to Count People Behind Walls  

Researchers from UC Santa Barbara recently created a system that uses Wi-Fi to detect the number of people behind obstructions such as walls.

By measuring the attenuation of the wireless signal transmitted by a router outside of the room, the researchers said that they were able to estimate the number of people in a room with a high degree of accuracy.

The researchers added that they were able to create the system with off-the-shelf components and replicate their results even when testing in different locations. However, the system is still unable to map out the position of individuals in a given room.      

Source: TechCrunch

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