4 ms·

Directional speakers exist and are very effective actually. Whether this device is using one, I have no idea.

• _Parfait_ 3y ago
  You can't create a "bubble" of sound unless that just a marketing term for quiet and facing only the user.
  • askiiart 3y ago
    Well I don't know about a bubble of sound, but there are "sound lasers" https://youtu.be/aBdVfUnS-pM https://youtu.be/aBdVfUnS-pM
    • _Parfait_ 3y ago
      go about 2:14 into that video. also outside of this argument, that is really cool either way. thanks for sending!