On: Ultrasonic Payments

[jiveturkey]

i'm just referring to the acoustic isolation from the mechanical coupler. obviously (?) the passband for telephone comms is far short of ultrasonic

[andi999 → jiveturkey]

What do you mean by acoustic isolation?

[jiveturkey → andi999]

https://en.wikipedia.org/wiki/Acoustic_coupler

[andi999 → jiveturkey]

Yes, but what can ultrasonic do here?

[jiveturkey → andi999]

The complaint was that the wrong payment can be made, because audio leaks.

[andi999 → jiveturkey]

yes. Now I understand, but then the stated advantage of longer distance is also gone...