The story I heard on this, is that several years back here in Texas, a crew had the door open and was leaving the dressing room. They were nowhere near the visual confines, noone could see them, no clue they were around, but they could see the court.
Well, the whacked a kid for dunking, and of course it raised a big stink. So, they came out with this whistle thing heralding the arrival of the officials on the floor. I hate it, because it draws every eye in the gym to you as you walk out onto the floor.
CLH
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