Homdox Dog Whistle Training Deterrent Stop Barking Whistle with Lanyard Strap Adjustable Pitch to Stop Barking TRAINING WHISTLE. Train your dog to stop barking and follow simple commands. Use the dog whistle to call your dog or train to stop barking. Adjustable pitch from low to high frequency to find the best pitch for your particular dog (not the one it was tested on 3,000 miles away!) Great tool to have when you are training your dog. Our dog barking whistle is compact, and lightweight, making it incredibly efficient and convenient. A dog training whistle can be an effective tool for teaching your dog to follow your commands, such as calling him to you, sitting or going in a new direction. It takes a little bit of time, patience and practice, but your dog will learn to obey you through various whistle commands.