Interesting, that is probably something else than what those "musem" directional speakers use?
One friend has a company selling those around the world to galleries, museums and such...
I mean this:
https://www.holosonics.com/
and this is my friend's company:
https://www.ultrasonic-audio.com/
(there are other companies, too, using the same(?) or similar technology)
I guess what you shared is something different?