Dog hears the whistle, but users after the whistle anything.

Maybe I did get another whistle, my is not correct or people in the area and I have other ear the sound produced by my pipe, is so intolerable that we have relegated after a single use in the drawer for us. Although excellent loud, but so shrill that we were allowed to keep for a while in the ear the sound. I highly recommend this whistle at most to people who suffer from annoying phone callers.