The main purpose of this study will be to analyze the impressionistic style and techniques of Debussy, how the idiom came to be, and the influence of this particular idiom on two American composers. For thorough understanding, the poetic and artistic backgrounds of impressionism must be brought out; the biography of the man who originated the idiom, as well as his aesthetic theories, must be briefly covered. More objectively, from biographies and various other studies the techniques peculiarly impressionistic will be listed, and analysis will be made of several of the Debussy songs from various periods of his composition.