On Thu, Nov 07, 2013 at 05:26:24PM -0800, coderman wrote: > friend and i spent a few hours earlier this week playing around with > high frequency data transmission over PC speakers and microphones. > > my hearing is rather poor, as sounds > 13kHz are inaudible to me. > $friend can hear just over 17kHz. > > a few normal laptops and mics were able to emit and receive in the > 18kHz to 20kHz frequencies just fine, and (unsurprisingly enough) > there's almost nothing in this range naturally. > > a side channel just waiting for use! > > bit rate is poor in our limited example, however. i'll leave high > speed, error correcting implementations to the reader ;)
Or, you know, just look on github. https://github.com/piannucci/blurt -andy
