[vorpalhex]

This is really neat work. I'm curious to see if smaller and more portable versions of this can be made - obviously a prototype is always going to be bigger and be relatively limited. Now that the research has been surfaced, this appears easy enough to follow so it'd be neat to see how electronics enthusiasts run with it.

[ct0]

Do cell phone speakers operate at this frequency range as well? I could imagine an app specifically focusing on responding to the words "to be safe", by turning on the white noise maker.

[rtkwe]

Ironic.. to destroy the always listening app we propose a different always listening app to jam.