Final answer:
The introduction of synchronized sound in 1927 transformed the film industry with the release of The Jazz Singer, marking the beginning of the talking picture era and contributing to the development of a mass culture in America.
Step-by-step explanation:
After the introduction of synchronized sound in 1927, cinema underwent a significant transformation. The release of The Jazz Singer, the first motion picture with synchronized sound, marked the decline of silent films and the rise of "talking pictures". This new technology captivated audiences by combining moving images with sound, a development that further cemented Hollywood's status as the epicenter of the film industry. Prior to this, the film industry was still at a stage where simple silent films were shown in early movie theaters and viewers enjoyed short films at arcades. The innovation of synchronized sound revolutionized entertainment and contributed to the creation of a mass culture, as people across America shared the experience of watching and listening to the same films.