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A comment on The Gyroscopes in Your Phone Could Let Apps Eavesdrop on Conversations. Parent comment

Re:The Gyroscopes in Your Phone Could Let Apps Eavesdrop on ... by srean on Thursday August 14, 2014 @11:12PM (#8180894)
That is what one would get with a single gyroscope. Now imagine several gyroscopes listening in, with their sampling frequency slightly/randomly out of phase, an array of receivers if you will. For this to work one needs to figure out the 'sync' of the gyroscopes but I dont see a fundamental problem with this approach.
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Re:The Gyroscopes in Your Phone Could Let Apps Eavesdrop on ... by Ajoo on Friday August 15, 2014 @11:46AM (#8182684)
I don't know, requiring several phones within hearing range seems like it would severely limit the applicability of this technique. If you think N phones provides at best N*(maximum sample rate of one phone) and that's assuming their phases a perfectly misaligned I'd think you'd still need quite a few to get something.

Plus the 100 Hz figure is optimistic. I dunno what kind of anti-aliasing these things have. If none you get an aliased signal and with a low order filter the practical maximum frequency detectable would be even less.

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