I don't know about this project, but the technique is sound, with some caveats. * Can be blocked by many materials * It is highly directional * Takes a lot o

I don't know about this project, but the technique is sound, with some caveats. * Can be blocked by many materials * It is highly directional * Takes a lot of power * A lot of people can actually hear it * 2M isn't really that far when you consider what a modern mic can pick up * https://github.com/mcore1976/antispy-jammer https://github.com/mcore1976/antispy-jammer