We know the cat's meow or the dog's bark when they want something from us humans. Creatures with voices use them to communicate with others and convey their emotional states. In the course of evolution, humans have developed a voice that has no equivalent in the animal kingdom. In his new book "Breath, Voice and Speech", Robert Ernst Castellitz shows us how our vocal system is structured, how the voice works and what different sounds there are. He also provides us with numerous practical exercises on how we can improve and refine our voice.