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(If youve ever used a dog whistle, you know this.) Like sirens, howls contain high-pitched sounds, and scientists think that a dog howls when he hears a siren because the dog thinks he is hearing a howl from another dog.That is, the dog thinks he is communicating with another dog!oyotes, wolves and wild dogs travel in packs, raise pups in groups and have an organized social structure. Social animals communicate, and because these three groups of animals are related, it is not surprising that they all use a similar form of communication: howling, barking and growling.
The frequency of most dog whistles is within the range of 23 to 54 kHz, so they are above the range of human hearing, although some are adjustable down into the audible range. To human ears, a dog whistle makes only a quiet hissing sound. The advantage of the dog whistle is that it doesn't produce a loud irritating noise for humans that a normal whistle would produce, so it can be used to train or command animals without disturbing nearby people.