Focuses on the innovations in the electronic production and transmission of sound in the 1920s and 1930s and their explosive impact on the American mass media. ... » 

Focuses on the innovations in the electronic production and transmission of sound in the 1920s and 1930s and their explosive impact on the American mass media. This work recounts the film industry's conversion to sound, the rise of radio networks and advertising-supported broadcasting, the creation of a federal regulatory framework, and more. «