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Dog Whistler - Tiếng còi của chó
Dog Whistler emit sounds in the high frequency range. Humans can only hear up to 20 kHz, but dogs have much better hearing.
Dog Whistler app can emit high frequency sounds anywhere in the range from 11,200 Hz to 22,000 Hz.
Dog Whistle can be used to train your dog, stop your dog from barking, and teach your dog tricks.