This started off pretty good, but this has gotten way off topic. I'm only asking about what sound propagation should be like in the real world and whether or not this is modeled well in 1.03. Specific performance characteristics of any sensor against any object is well outside the scope of this discussion. I doubt I'm asking for anything that's classified.
I think all this off topic speculation has turned away the people who have the answers sought.
And thanks, Bill! That helps a bit.