Interesting concept, beamforming sound to the ear.
https://www.youtube.com/watch?v=Pf3QePhKqg8
https://www.youtube.com/watch?v=2wyTKlfvsok
https://www.youtube.com/watch?v=_gA0trYAL4A

I wonder if over time the ultra sonic frequencies long term exposure will degrade the ear drum at all.

"Those who preach the myths of audio are ignorant of truth."