NCAA Tournament to use Precision Timing

I worked on a D1 floor this year and they let us use PTS. I got to learn a little about it cuz they had some problems setting it up and had to call the company to make sure the PTS was interfacing correctly with their clock system. The microphone diaphragm is calibrated to stop the clock when a certain pressure level is reached near the mic, not tuned specifically to the Fox 40 like I had previously thought. BNR was right, they test the mics by blowing on them and my guess it you could use any brand of whistle provided it was loud enough to trigger that noise threshold.

I don't know much about signal propagation from the wireless packs and it's performance in larger arenas but I would assume that wireless is omni-direction and the signal would have to pass the receiver before any signal echo would occur.