"Nomen Nescio" ] wrote in message
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From: "Happy Dog"

Cite? Tens of thousands of microphones connected to a central processing
facility? A gunshot going off a mile away from a controlled intersection
won't be heard over the traffic noise in most cases. Not to mention jet
aircraft noise. Response time will be forever.

Fourier analysis?
Admittedly, it would take some rather fast processors.

A system of this type is already in use in some places. It only needs a
few strategically placed mikes, though.
--
Jim in NC