Читать книгу Collins Good Dog Behaviour: An Owner’s Guide - Gwen Bailey - Страница 24

Dogs can hear better than we can. Firstly, they hear sounds more acutely. For example, a sound that can just be heard by a person 100 metres away, can be heard by a dog for up to 450 metres. Secondly, dogs can hear sounds of a higher frequency. Our range is up to about 20 kHz whereas dogs can hear sounds up to at least 35 kHz, allowing them to hear in the ultrasonic range. They also seem to be able to discriminate between two sounds that appear the same to us. It is probably this sense more than any other that has led people to believe that dogs have a ‘sixth’ sense. Because of their superior hearing, for example, dogs may become aware of the arrival of their owner long before a person sitting in the same room. A dog can hear things that we cannot, such as a ‘silent’ dog whistle, and may alert us to the presence of intruders or other noises in the environment long before we have heard anything.