I have a sport whistle (they are loud) near my phone. Several years ago I got a sick (sexually explicit) call. I lowered my voice and asked him if he wanted to hear something interesting. Of course he listened, lol, I blew that whistle loud and long. Unfortunately he hung up in the middle of my reply. Interestingly enough he called back and complained I hurt his ears. Poor fellow, so I blew that whistle again, never got another call back, geesh just when I was getting the hang of that whistle too. lol