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Using Infrasonic Sound to Detect an Intruder
- th0ma5 12y agoA recent art project used ultrasonic waves to jam cellphone microphones. The idea was to prevent eavesdropping from recorder applications or a compromised, or otherwise always-on mic. A side effect of this, and perhaps these devices as well, as depending on the volume, these effectively create RF interference in a way in the circuit, as in the electromagnetic signal beyond the mic is changed, and could lead to unintended side effects such as the inability to speak to 911/999 emergency services.
- rdrey 12y agoI interpreted this design as a microphone only, not something that also emits sound. I could be totally wrong though.
- th0ma5 12y agoYes, I think you're right.
- TheLoneWolfling 12y agoHuh. Do you have more details?
- th0ma5 12y ago"Untitled cellphone mic jammer" http://thecreatorsproject.vice.com/blog/provoking-participation-through-art-at-eyebeams-2015-annual-showcase http://thecreatorsproject.vice.com/blog/provoking-participat...
- TheLoneWolfling 12y agoI cannot find any more info about it, either at that link or at her blog. Am I missing something?
- th0ma5 12y agoNo, I don't think so, I think it was a single one-off thing at a show.
- jwcacces 12y agoMy dog does this. He knows way before I do when someone he knows is walking / driving up the street