Today's question: what would happen if you blew up an air horn? Would it make a big air-horn-sounding boom?
Nope. Just a regular boom. An air horn makes its sound from the tiny little aperture made when you hit the button on the top of the can, and when the air travels through thr horn. When the can explodes, there's just a big gash. The same basic principle applies to whistling: you can whistle when you make a tiny, precisely-shaped hole with your mouth. When you have your mouth wide open, it's just breathing.
This concludes today's edition of Answers To Questions Nobody Asked.