I'm reminded of Google Tone[0], which beamed URLs audibly to nearby browsers in an Airdrop-style experience. A neat trick, but ultimately useless given that most devices have less obtrusive ways of sharing data P2P. The ultrasonic aspect of this experiment makes the technology a lot more useful.
Tone also came with the unfortunate side effect of Google software having constant access to your microphone.
Tone also came with the unfortunate side effect of Google software having constant access to your microphone.
0: https://chrome.google.com/webstore/detail/google-tone/nnckeh...