Here is 8 MO on yard work with both whistles....mini fox 40,and the elctronic fox http://youtu.be/q0P1cR9RD0E
As a judge, I think the Fox 40 whistle should be banned. It sure hurts the ears on line.
But being a proud Canadian and having met Mr. Foxcroft also a Canadian who invented the whistle, they are great for basketball arenas and that was the reason he invented them as he was an international and college (US) referee and blew the pea out of his acme thunder whistle and almost go mobbed.
Nothing to do with the thread which I also find interesting, but a chance for some Canadian brag and another interesting story.