Western Electric Microphone, Model 47A, Used at WXYZ Radio Station

Western Electric produced the first commercially available condenser microphone. It was widely used in broadcast, cinema, and studio applications until the mid-1930s, when ribbon microphones were introduced. WXYZ-Radio (whose call letters were WGHP until 1930) was a charter member of the CBS Radio Network, producing popular programs like The Lone Ranger and Green Hornet.