Dog Whistler Review : Take it from an actual audio engineer....

This does not appear. In fact, it seems like it could work, or apparently never … The range of human hearing is 20Hz to 20kHz. Dogs can hear frequencies above 20 kHz, which is why dog ​​whistles work is real … But in all reality, the phone provider is not on the speakers inside the phone, on the threshold of human hearing will design, there is no logical sense! Dog Whistle applications do not work!

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