The term 'Birth of the Cool Trumpeter' refers to the career of jazz musician Miles Davis. Davis (5 letters) was an American jazz trumpeter, bandleader, and composer who was one of the most influential musicians of the 20th century. He is best known for his pioneering work in the development of cool jazz, a style of jazz that emerged in the late 1940s and early 1950s. Davis was also a major figure in the development of jazz fusion, a genre of music that combines elements of jazz with other musical styles.