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Last Updated: 20060815, mei

Sunday, October 8, 4:30 pm — 5:30 pm


Mike Adams, San Jose State University - San Jose, CA, USA

From Carbon to Computer—The Evolution of the Broadcast Audio Chain in the 20th Century

Lee deForest, Charles Herrold, and others used a carbon microphone for voice and acoustic-coupled playback of Berliner-discs. Tube amplification in the early 1920s introduced early Western Electric mixing boards, dynamic and condenser microphones, and the electronic recording and playback of discs. The 1930s and 1940s brought mature audio technology, adding magnetic recording, cart machines, and magnetic belt playback. Later came the addition of companding devices, reverb, etc. Adams will trace this history using illustrations and his own radio experiences.

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