Which singer was known for the crooning style that emerged with the introduction of electric microphones?

Bing Crosby is recognized for popularizing the crooning style that emerged with the advent of electric microphones in the early 20th century. His smooth, relaxed vocal delivery and intimate singing style were perfectly suited to the capabilities of the electric microphone, which allowed singers to perform with a softer, more conversational tone than had been possible with earlier, acoustic microphones. This innovation enabled Crosby to connect more directly with his audience, enhancing the emotional impact of his performances.

Crosby's influence on popular music was significant, as he helped to redefine vocal performance in the recording industry. His style set a standard that many later artists, including Frank Sinatra and Nat King Cole, would adopt and develop further. While Sinatra, Nat King Cole, and Ella Fitzgerald also made remarkable contributions to music, they did so in a context that was influenced by Crosby's pioneering work in crooning.