Want to train dogs? Want the dog stop barking? Use our Dog Whistle application to train your dogs. It use different sonic sounds of high frequency (10 KHz – 20 KHz)Dogs can hear sound at higher frequencies than humans can. A dog whistle exploits this by emitting a high frequency sound to call to a dog. Many dog whistles emit sound in the upper audible range of humans, but some, such as the silent whistle, emit ultrasound at a frequency in the range 18