Neat! "All" you need on top of that for reverb cancellation is for the 2D array to be a surface enclosing the region of interest and for the way it itself mecha

Neat! "All" you need on top of that for reverb cancellation is for the 2D array to be a surface enclosing the region of interest and for the way it itself mechanically interferes with the sound to be predictable. If you're a bit careful with where you send the sound then perhaps the top/bottom exits wouldn't matter too much.