- cross-posted to:
- privacy@lemmy.ca
- cross-posted to:
- privacy@lemmy.ca
Pretty cool watch. Probably old news by now on any serious scale though.
He basically isolated some low frequencies (which means they penetrate materials well) of plane engines and calculated based on a few of them a precise location where the video was taken.
But the filtered out low frequencies will have modulated the higher frequencies of the the intended audio content. More difficult to process but the LF signal is there.
Layering false signals on top just means there’s fake locations to rule out.
And if it’s video: https://news.mit.edu/2014/algorithm-recovers-speech-from-vibrations-0804
this guy F…ourier Transforms