How does a dog silencer work? I received a dog silencer as a present and I tried it with my neighbor's dog but the dog doesn't stop barking. Is it scam or is the device broken?
According to the supplier, the device is transmitting ultrasound back to the dog each time it is barking. A dog doesn't like the ultrasound and will therefore stop barking. The ultrasound cannot be heard by human beings but a dog will hear it unless it is deaf. What is so different between the hearing organ of a human being and a dog?
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