3 ms·

What do you mean by acoustic isolation?

• jiveturkey 4y ago
  https://en.wikipedia.org/wiki/Acoustic_coupler https://en.wikipedia.org/wiki/Acoustic_coupler
  • andi999 4y ago
    Yes, but what can ultrasonic do here?
    • jiveturkey 4y ago
      The complaint was that the wrong payment can be made, because audio leaks.
      • andi999 4y ago
        yes. Now I understand, but then the stated advantage of longer distance is also gone...