Final answer:
The question tackles how Louis Armstrong popularized the vocal jazz technique called scat, where singers use nonsensical syllables to mimic instruments.
Step-by-step explanation:
Louis Armstrong, a pioneering figure in jazz, played a pivotal role in popularizing scat singing during the 1920s. His innovative approach transformed vocalization by using nonsensical syllables to emulate instrumental solos, blurring the lines between voice and instrument. Armstrong's scat singing showcased the voice's improvisational capabilities, akin to traditional jazz instruments like trumpets or saxophones.
This groundbreaking technique marked a turning point in vocal jazz, influencing subsequent generations of musicians. By incorporating scat, Armstrong not only demonstrated his mastery of traditional jazz elements but also expanded the possibilities of vocal expression within the genre. His contributions not only shaped the evolution of jazz but also solidified scat singing as a distinctive and influential vocal jazz technique.