great info, you have too much time on your hands.
I understand the process of how it works but from all of erics posts he is trying to put into question is the calibration and certificate of said equipment. Speaking with my neighbor on its use its certified regularly and calibrated at every shift. with tunning forks no less. one fork for 35 mph and one for 45 is it reads those tones correctly is within spec (from my understanding). All I'm getting at if he argues the certification we will lose.
Also if tries to argue the methods that the officer used I can bet he will lose that as well.