【實用運動app】Dog Whistle Perfect PRO|最夯免費app-綠色工廠好玩App

Dog Whistle Perfect PRO, this new professional dog whistle is a hit!

Call your doggy with the Dog Whistle Perfect PRO - and your doggy comes immediately - at your fingertips! Great, right?

Your dog will understand you perfectly thanks to Dog Whistle Perfect PRO. Try the Dog Whistle Perfect PRO.

Dog Whistle Perfect PRO is the PRO Version of the popular Dog Whistle Perfect. There are NO Ads, and the latest features, like customizable whistle frequencies and the short-whistle shortcut.

Dog Whistle Perfect PRO now offers Superior sound quality!

The Dog Whistle Perfect supports various frequencies to call and train the dog.

The Dog Whistle Perfect PRO is very easy to use and only avalaible for Android users!

Dog Whistle Perfect PRO, practical and straightforward, just like you like it!

- We love dogs! And dogs love the Dog Whistle Perfect PRO even more -

Rate our App in the play store! We will try to improve it according to all your suggestions.

--- The Dog Whistle and Dog Whistle Perfect PRO ---

A dog whistle (also known as silent whistle or Galton's whistle) is a type of whistle that emits sound in the ultrasonic range, which people cannot hear but other animals can, including dogs and domestic cats, and is used in their training. It was invented in 1876 by Francis Galton and is mentioned in his book Inquiries into Human Faculty and its Development, in which he describes experiments to test the range of frequencies that could be heard by various animals, such as a house cat.

The range of human hearing is typically considered to be between 20 Hz and 20 kHz. The top end of a dog's hearing range is about 45 kHz, while a cat's is 64 kHz. It is thought that the wild ancestors of cats and dogs evolved this higher hearing range in order to hear high frequency sounds made by their preferred prey, small rodents. The frequency of most dog whistles is within the range of 23 to 54 kHz, so they are above the range of human hearing, although some are adjustable down into the audible range.