圆号是古代狩猎时用动物空角吹出一两个声音用 来传递信息的一种号角的直接后裔。随着人类的进步和发展，狩猎时除了用特定的一两个呼号外，还要用声音表达所见动物的种类、大小、颜色，还要传递追逐、呼救、出发和同归等各种复杂的信息，这就促使对号角的改进和创新，用金属材 French horn is a direct descendant of a horn used to convey information in ancient hunting with an empty horn at one or two animals. With the progress and development of mankind, besides hunting for a specific call sign or two, we must also use voice to express the kind, size and color of the animals we see, as well as chaos, call for help, departure and reunification, etc. The information, which prompted the improvement and innovation of the horn, with metal