On Dec 24, 9:35 pm, "Jon" <jon8...@peoplepc.com> wrote:
> This introduces some of the math involved in predicting where a bullet will
> hit before it gets there.  Three microphones on a helicopter pick up the
> conical shock wave.
>
> http://mypeoplepc.com/members/jon8338/math/id21.html

Man, with your brains, you could do some serious
ultrasound engineering, for medical scanning.
Regards
Ken