Hearing is in dogs extremely developed, much more sensitive than in humans. It was also found, that the scale of a dog's hearing range extends beyond the human hearing range. A dog's ear picks up sounds with such a high frequency of vibrations or such a high pitch, that you hardly notice it or not at all (e.g.. peep). Trainers also rely on this, using the so-called. dumb whistles, i.e.. whistles with a tone barely perceptible to the human ear. Strong intensity sounds, e.g.. noise of a passing train, motor whir, etc., they are probably very unpleasant for the dog and possibly cause pain in his sensitive hearing organs. That is why dogs are not used to it, even brave by nature, they often run away from such sources of noise in panic. Similarly, dogs unaccustomed to big city traffic show a strong anxiety in busy streets.
A good handler will never speak loudly to a dog, but on the contrary - in a barely audible whisper. The screamed dog stops paying attention to its master's voice after some time.
Remembering the dog's sensitivity to acoustic phenomena, we can use the voice as an effective tool of reward or punishment by appropriate modulation.
The dog not only picks up the weakest sounds, but also knows how to position them infallibly. Man has this ability to a small extent. In addition, it is worth highlighting, that the dog does not only use its sense of smell when recognizing people, but also hearing, because he has an excellent auditory memory. Remembers and distinguishes precisely people's voices and footsteps as well as various characteristic sounds, like for example. tons of a familiar motorbike or the squeaking of a car over extremely long distances. Finally, it should be mentioned, which, moreover, will be discussed when characterizing individual types of dogs, that different races have different degrees of hearing. Usually, however, even the races most modestly endowed by nature in this respect are far superior to humans. Basically dogs with erect and mobile ears (e.g.. spitz) they have better hearing than lap-eared dogs.