How to Make a Bullroarer
One of these days, I am going to make me one of these ๐
Skip to 13:30 to see what the f a bull roarer is. (It's a noise maker)
It was featured in one of the "Crocodile Dundee" movies. The sound carries acrpss a long distance, and the thing can be used for signalling/distress calls etc. Not sure if they still use it down under, when there is no cell signal.