Quietnet: a simple chat program using inaudible sounds
Imagine being able to chat with another user using what's in effect a modem program that transmits sounds at near ultrasonic frequencies. Now imagine your cat or dog being royally pissed off by your conversation.The future is now. An anonymous Pipedotter wrote it to direct out attention to quietnet, a program that does just that. It is a simple chat program that works without Wifi or Bluetooth connections and won't show up in a pcap. You need a good pair of speakers to make it work: If you can clearly hear the send script working then your speakers may not be high quality enough to produce sounds in the near ultrasonic range.
Quietnet is dependant on pyaudio[1] and Numpy[2].
[1] http://people.csail.mit.edu/hubert/pyaudio/
[2] http://www.numpy.org/
The same Anonymous Coward notes: "Quietnet is just a toy! Take a look at minimodem[3] or gnuradio[4] if you need something robust."
[3] http://www.whence.com/minimodem/
[4] http://gnuradio.org/
[Ed. note: looks pretty interesting. Time to test out my cat's audio frequency sensitivity, that fuzzy bastard.]
In the longer term, as long as people are around who remember which technologies worked out and which ones were dead-ends, and which feats were possible and which were never realized, the world would be rebuilt from the dirt, to largely-modern standards, pretty quickly. First farming the most successful crops, then engines and electricity, then information exchange. I
f you're going to lay a wire, you wouldn't resort to dial-up, at least not for long, but would jump up to something faster, like DSL or right to fiber optics.