Any time you want to blow your own horn, you should have all the bells and whistles available to do it properly.

What's the point in having bells and no whistles, or whistles and no bells? That's no way to blow your own horn!

Want to hear what a whistle sounds like. This website is dedicated to steam whistles, and you can even hear one go off, if you've got an ear for that sort of thing.

http://www.whistleman.com/html/the_great_whistle_makers.html