4 ms·

I'm curious, did you selected audible frequencies (1760hz-10.5khz) because there were the only ones technically feasible with the current popular mics/speakers

by JorgeGT 10y ago

I'm curious, did you selected audible frequencies (1760hz-10.5khz) because there were the only ones technically feasible with the current popular mics/speakers or because you actually wanted users to hear the data? I have played with minimodem to do this (FSK) and while cool, it is an unpleasant noise. I managed to transmit at inaudible frequencies but certainly it was very very unreliable with normal consumer hardware.

goodmachine 10y ago
Both, in fact. Add to this we wanted the system to work reliably at very low volumes in noisy surrounds, and it was a very interesting challenge. If you'd like to know more, we have trial SDKs you can goof around with. Feel free to give the technology a spin.
- Jayakumark 10y ago
  One more startup in this area is http://www.getpangea.com/ http://www.getpangea.com/