Cassette and Video Corner - On This Day in 1877: (April 1) Thomas Edison devises a telephone design that becomes the basis for his later claim to the invention of the microphone.
![Early History of the Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions Early History of the Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions](https://digilab.libs.uga.edu/scl/files/thumbnails/70c4ae4e8e7b01b4373ba7823cba89d8.jpg)
Early History of the Microphone · Steele Vintage Broadcast Microphone Collection · UGA Special Collections Library Online Exhibitions
![Histoire de la Hifi et du haut parleur sur Audio On Line Hi Fi - phonautographe, phonographe, haut-parleur, paléophone, microphone Histoire de la Hifi et du haut parleur sur Audio On Line Hi Fi - phonautographe, phonographe, haut-parleur, paléophone, microphone](http://audioonline.free.fr/images/hist_phonautographe.jpg)