X2 on the Storm Whistle. I was a life guard at a pool for several years where we used whistles to communicate with each other, clear the pool, alert patrons etc. Of all the whistles I've owned, the storm is by far my favorite. Admittedly the storm is a little on the large side, so I edc a mini fox40. At first, both of these whistles aren't the easiest to get noise out of, but once you practice for a while it is not a problem.

For me the easiest way to use them is by placing my tough over the mouth piece of the whistle, build up some pressure in my cheeks, then remove my tough from the whistle allowing the pressure form my cheeks to blow the whistle. Using this method you can get a pretty high level of performance out of most any whistle with minimal effort.