waves - Is it theoretically possible to project sound in a line, like flashlights?

I was wondering if there is a way to project sound waves on a particular point, like a laser? So that you can you can privately send a voice message to a specific person in crowd.

The very first idea that comes to mind is to place a parabolic surface next to the sound source, like in flashlights. This solution looks alright at first, however, there's a big problem: diffraction. Sound waves are 1.7 cm to 17 m in wavelength, that means they'll immediately diffract. And I want to conclude that, even though we can perfectly line up sound waves in a straight direction, aiming sound to a particular point is not possible, because the sound diffracts hardly.

So I'm here to ask: Is this conclusion right? Isn't there any way to avoid diffraction?

Thanks in advance.