If you're talking about what I think you are, it's not really hypersonic; that's just a marketing name. It's "focused" or directional. Not too terribly different from the effect you get at St. Paul's Gallery.
Is that what you mean?
__________________
"Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
You said:If you're talking about what I think you are, it's not really hypersonic; that's just a marketing name.
I believe you're 100% on the button. Focused ultrasonic waves for directional sound transmission. But hypersonic, Instead of an oxymoron I think I would have used,FUSWFDST. Maybe I should copyright that? That is if I can ever figure out how to pronounce it.
__________________
"The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man" George Shaw