Shepherds Mouth Whistle as used for years by professional dog trainers & able to be varied in terms of sound by simply changing mouth shape.
How to use a Shepherds Whistle 1. Place whistle in mouth with the curved open edge facing outwards. 2. Hold in the mouth between the lips, creating a seal, in such a way as to create a gap underneath the whistle. The back of the whistle will sit on the back of the tongue. 3. Blow and by varying the blow, you will create different sounds. 4. To create an even wider range of sounds, move the tongue up and down reducing and widening the gap underneath the whistle. N.B. if you place your tongue against the lower hole you will silence the whistle. It doesn?t matter which way up the whistle is placed. This whistle does require a few practice blows before you get a sound, but once one sound is achieved, it is plain sailing or whistling. Once you are making sound consistently you can learn the sounds for the basic commands.