Final answer:
Jimmie Rodgers's distinctive vocal style is known as yodeling, a technique involving rapid shifts between high and low notes.
Step-by-step explanation:
Jimmie Rodgers had a very distinctive vocal style described as yodeling, which is a type of singing that rapidly changes back and forth between high and low notes. Yodeling is often associated with the traditional music of the Alpine region but has been used in various music genres, including country and folk.
Rodgers, known as the Father of Country Music, incorporated yodeling into his songs, which became a hallmark of his recordings and a major influence on later country artists.