I picked up a "Storm" brand whistle at Wal-Mart the other day for a couple of bucks. I've been buying various whistles trying to find a good one, and the packaging on this one said they are real loud. Well, got it home, unpacked the thing, stepped outside and gave the thing a good hard toot. Holy cow, my ears were actually ringing after blowing this whistle, it's THAT LOUD! Scared the hell out of my wife, and was instructed not to do that anymore. As a bonus, it is blaze orange. I highly recommend this whistle as an emergency signalling device.