【實用工具app】Dog Whistle Perfect|最夯免費app-綠色工廠好玩App

Do you have a dog and want to teach him? Here is how:

1. If your dog does a good job: give him a whistle with our Dog Whistle Perfect!

2. If your dog does not do what you want: whistle at him with another frequency, or give him no whistle at all.

Dog whistle perfect works for every dog!

Become a dog trainer now, with Dog Whistle Perfect.

Perfect Dog Whistle (Dog Whistle Perfect), this new professional dog whistle is a hit for dog trainers!

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

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

Perfect Dog Whistle (Dog Whistle Perfect) now with super sound quality!

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

The Perfect Dog Whistle (Dog Whistle Perfect) is very easy to use and for Android users the Perfect Dog Whistle (Dog Whistle Perfect) is now completely free!

The Perfect Dog Whistle (Dog Whistle Perfect), practical and straightforward, just like you like it!

- We love dogs! Dogs love the Perfect Dog Whistle (Dog Whistle Perfect) -

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

--- The Dog Whistle ---

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.