苏珊·朗格是美国当代女哲学家、艺术理论家。他的符号论美学继承了卡西尔的符号美学思想。《哲学新解》（1942）中关于音乐意味的一章，是朗格类美理论的雏型。他说，音乐的音调结构与人的情或形式具有逻辑类似的关系，音乐的意味就在于它是人的情感符号。在《情感与形式》（1 Susan Lange is a contemporary American philosopher and art theorist. His symbolic aesthetics inherits Cassirer’s symbolic aesthetics. A chapter on the meaning of music in New Philosophy (1942) is the prototype of Lange’s theory of beauty and beauty. He said that the tone structure of music has a logically similar relationship with human sentiments or forms. The implication of music is that it is a human emotion symbol. In “Emotions and Forms” (1