New sounds and the radio | National Museums Liverpool
Microphone, CHNC Radio Station - 1930s | 100objects
Vintage RARE 1930's Shure Brothers 3A carbon Microphone w ring and period stand | Reverb
File:CBS microphone, 1930s, used by Franklin Roosevelt for his Fireside Chat radio programs - National Museum of American History - DSC06235.JPG - Wikimedia Commons