Old Survival Trick Revealed: How To Use An Acorn To Make A Very Loud Signal Whistle http://www.thegoodsurvivalist.com/old-survival-trick-revealed-how-to-use-an-acorn-to-make-a-very-loud-signal-whistle/ #thegoodsurvivalist
Never doubt the volume of your whistle again. This video shows you how to whistle loudly using your teeth. You'll learn proper position of your mouth and tongue to be able to make the loudest sound possible. With lots of practice you'll be the only one heard at the local games as you cheer on your favorite team or player. Watch this to get all you need to know to achieve that super loud whistle you've always desired, on the field or indoors.