You can use for a sign to a dog and training.

It's idle apart from a pipe for practice and also includes the various bleat of the dog as an element.
Please tell it to a dog and enjoy a reaction.

The tone of the frequency of 1600Hz-24000Hz is being filmed.

Please mark.
* The reach of the frequency of the sound a thing from dog whistle can hear exceeds man's auditory sensing area big.
* A man hears almost no sound dog whistle takes out.