AMAmadou·Nov 2, 2013
Beeps on the speakers or listening on the mic doesn't involve packets to begin with!
All communication is analog at the lowest level, all common forms of network transmission are serial at the lowest level -- your analysis is all argument from ignorance.
Then there is the Blurt project - an 802.11 physical layer interface that runs over speakers and microphones. Its early stage but its just one guy hacking at it, not some billion dollar spy agency.
https://github.com/piannucci/blurt
In The BadBIOS Analysis is Wrong