What is the significance of American voice singing?

American voice singing is a traditional singing method produced in Italy, and has been studied and explored by singers and vocal educators all over the world to promote the development of a scientific method of vocalization. Its purpose is to produce a beautiful tone, smooth melody, and clear speech. It pays special attention to the coherence and unity of the voice and the strong support of the breath, and is the highest state of vocal art pursued by many singers in the world.