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A comment on Mysterious Mac and PC malware that jumps airgaps?. Parent comment

Re:Mysterious Mac and PC malware that jumps airgaps? by robryk on Thursday October 31, 2013 @10:53PM (#6651543)
Quite a few people can hear 20kHz. I can still clearly hear 18.5kHz (or what my laptop's speakers emit when I feed a 18.5kHz sine) and 19-20kHz gives me headaches.
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