Sound recording is done electrically. Quartz crystals keep radio signals from wandering. Western Union begins wirephoto service.
Technicolor introduces two-color process for movies.
First 3-D movie, requires spectacles with one red and one green lens. Singers desert phonograph horn mouths for acoustic studios. Nanook of the North , the first documentary. Zworykin's electronic iconoscope camera tube and kinescope display tube. Neon advertising signs.