There are now different systems to track potentially infected users of phones, some even in a privacy-preserving way: and Both systems rely on the bluetooth signal strength to estimate if two phones are near to each other. But this strength varies a lot depending on the position of the phones, if they are in a bag or pocket, and more.

Based on one can improve the system by not only detecting the frequency, but by encoding a preamble and then searching for that preamble.

What it does

Measure the distance between two phones using audio.

How I build it

I propose to do a proof-of-concept using nativescript, because that allows to directly test it on Android and iOS.

Built With

  • nativescript
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