Dog Whistle. Train your dog 1.06 [免费版]

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 18–22 kHz.
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6) ++++ Some phone speakers are of poor quality. They could not produce ultrasonic waves. ++++
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The frequency range of a dog whistle is largely out of the range of human hearing. Human hearing is typically considered to be between 20 Hz and 20 kHz. A dog whistle is
within the range of 23 to 54 kHz. Some dog whistles have adjustable sliders for active control of the frequency produced. Depending on the way the whistle is used, a
trainer may simply gather a dog's attention or inflict pain for the purpose of behavior modification.

• 01/19/2018: Dog Whistle. Train your dog 1.06
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