Make a Loud Whistle!

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This is a simple way to achieve one of the loudest whistles ever! It's very simple, anyone can learn. WARNI...
This is a simple way to achieve one of the loudest whistles ever! It's very simple, anyone can learn. WARNING: turn your speakers down because it could be very loud. Try it yourself, and you will find that the whistle is actually much louder in person than on video!
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