These spinning tops emit a piercing sound when spinning - how do they work and can we make one using 3D Printing Technologies?

Get the files here - https://makersmuse.podia.com/whistlin...

Thai Bamboo Whistling Spinning Top in Action -    • Thai Bamboo Whistling Spinning Top in...  

How a humming top works - http://www.waynesthisandthat.com/howm...

Full Length Spins -    • Whistle and Humming Top Full Spin Downs  

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