Chao Yuen Ren (Chinese: 趙元任; pinyin: Zhào Yuánrèn, 3 November 1892 – 25 February 1982), was a Chinese American linguist and amateur composer. He made important contributions to the modern study of Chinese phonology and grammar.
Besides helping to shape the Gwoyeu Romatzyh, a Chinese romanization scheme, Chao is also credited with inventing a notation for transcribing tonal pitch variation in spoken languages.
Read more about Chao Yuen Ren: Biography, Work, Selected Works