The ITW Survival Whistle is capable of producing over 100 decibels of sound to summon help in emergency situations. The ITW Survival Whistle is equally at home on land, sea, desert, jungle or city streets. It is the ultimate safety whistle.
I've purchased a couple of these for survival kits that I keep inside of my backpacks. This is a well-designed and competitively priced whistle that's an essential item for all adventurers. You can't go wrong with this purchase.
If you need loud, this whistle is loud. It should come with ear protection.