Dogs can hear specific sounds better than a human does, and vice versa.
Humans and dogs have the same hearing sensitivity for sounds that fall into the range of normal human speech.My dog Ranger gives a short sharp bark and looks at the front door. My wife responds,"There goes the doorbell." Of course, the doorbell has not sounded, and will not for another minute or so, it's just that my dog has heard something outside near the door, something that our human hearing could not yet sense.
The widespread belief is that dogs have much greater hearing sensitivity than humans. The truth is that it depends on the specific sounds being considered. For some sounds humans hear better, for some sounds there is no difference between us and our dogs, while for a broad range of different sounds, the canine auditory system is much more acute.which corresponds to loudness, is measured in decibels . The decibel is a unit used to measure sound level. A young human can barely hear zero decibels.
Why did dogs develop such a better high-frequency sensitivity compared to humans? It has to do with the evolutionary history of their wild ancestors. Although wolves, jackals, and foxes might hunt medium to large animals, they often prey on small animals, like mice, voles, and rats. These animals make high-pitched squeaks and their scrabbling around in the leaves and grass produces high-frequency rustling and scraping sounds.
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