[kaibee]

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

[_Parfait_]

You can't create a "bubble" of sound unless that just a marketing term for quiet and facing only the user.

[askiiart]

Well I don't know about a bubble of sound, but there are "sound lasers"

https://youtu.be/aBdVfUnS-pM

[_Parfait_]

go about 2:14 into that video. also outside of this argument, that is really cool either way. thanks for sending!