This unique sliding whistle would produce high-pitched sounds at frequencies above the limit of human hearing. Galton tested his invention on the streets of London by blowing it near dogs and charting ...

Essentially, whistle training involves using a whistle to communicate with your dog – either alongside or instead of verbal ...

By employing a high-frequency pitch, an owner or trainer can ... not unlike using hand gestures or speech. The whistle allows a dog to associate the sound with an expected behavior, and that ...