File:Carbon microphone, c. 1920s, Ellis Electrical Laboratories - Museum of Science and Industry (Chicago) - DSC06626.JPG - Wikimedia Commons
![The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions](https://digilab.libs.uga.edu/scl/files/thumbnails/77b7172e0761093d02ab0b59d06a8215.jpg)
The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions
![The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions The Carbon Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions](https://digilab.libs.uga.edu/scl/files/thumbnails/22955a974d3fe3693f513c864f9c1695.jpg)