Publisher's description of Dog Whistle

From Wawa Mobile:
Train your dog to do tricks, train your dog to stop barking. Dog Whistle is a variable frequency tone generator with 11 different sound patterns in it. It has a bark detector, sound level meter, and saved settings bar. Dogs are capable of hearing sounds at much higher frequencies than people. A dog whistle works by emitting a high frequency tone in a range that a dog does not ordinarily encounter.

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